alt.hn

1/31/2026 at 12:51:27 AM

Show HN: I trained a 9M speech model to fix my Mandarin tones

 https://simedw.com/2026/01/31/ear-pronunication-via-ctc/

by simedw

1/31/2026 at 2:17:57 AM

Longtime lurker, made an account specifically to give feedback here as an intermediate speaker. :)

This is a great initiative and I hope to see more come out of this; I am not criticizing, but just want to provide my user experience here so you have data points.

In short, my experience lines up with your native speakers.

I found that it loses track of the phonemes when speaking quickly, and tones don't seem to line up when speaking at normal conversational speed.

For example, if I say 他是我的朋友 at normal conversational speed, it will assign `de` to 我, sometimes it interprets that I didn't have the retroflexive in `shi` and renders it `si`. Listened back to make sure I said everything, the phonemes are there in the recording, but the UI displays the wrong phonemes and tones.

By contrast, if I speak slowly and really push each tone, the phonemes and tones all register correctly.

Also, is this taking into account tone transformation? Example, third tones (bottom out tone) tend to smoosh into a second tone (rising) when multiple third tones are spoken in a row. Sometimes the first tone influences the next tone slightly, etc.

Again, great initiative, but I think it needs a way to deal with speech that is conversationally spoken and maybe even slurred a bit due to the nature of conversational level speech.

by dapangzi

1/31/2026 at 4:27:30 AM

The tool definitely needs to address tone transformations, it’s a big part of how the language is spoken. Otherwise it’s mostly useful for a first year student speaking in isolation.

Hoping to see improvements in this area

by mercanlIl

1/31/2026 at 11:19:50 PM

Thank for the great feedback!

I have just added sandhi support, please let me know if it's working better.

by simedw

2/1/2026 at 10:34:46 PM

Still having some issues that match my previous comment, I'll try to follow your blog and give more feedback as you work on it.

Will comment that the shorter phrases (2-4 characters long) were generally accurate at normal speed, but the longer sentences have issues.

Maybe focusing on the accuracy of the smaller phrases and then scaling that might be a good way to go, since those smaller phrases are returning better accuracy.

Again, really think this is a great initiative, want to see how it grows. :)

by dapangzi

2/1/2026 at 4:48:04 AM

ACKing your comment.

Will check once the TV is off in the house. :)

by dapangzi

1/31/2026 at 4:05:50 AM

I don't think it takes care of tone transformation (eg 他是 ni3shi4 -> ni2shi4). Or if it does, my tones are just off. But it's a really cool idea!

by sqs

1/31/2026 at 7:51:49 AM

他是 is tāshì which doesn't transform I think. Did you mean to write 你是 nǐshì? I think that transforms differently though. With the half 3rd tone only dropping.

The classical example is 4/4 不是. Which goes bùshì -> búshì.

Or 3/3 that becomes 2/3. E.g. 你好 nǐhǎo becoming níhǎo.

The 1/4 -> 2/4 transformation I think is specific to one. 一个 yīgè becomes yígè.

by carlmr

1/31/2026 at 5:40:13 AM

The tone sandhi example you just gave looks incorrect to me

by jhanschoo

1/31/2026 at 7:58:01 AM

Well, OP wrote "he is" but then wrote "you are" in pinyin for one, and that's a bit hard to reconcile.

by jimz

1/31/2026 at 4:03:58 AM

I had the same issue! Perhaps being another dapangzi is the problem here lol

by tifan

1/31/2026 at 5:05:54 AM

I'm not familiar with this slang: what's a big plate?

by et-al

1/31/2026 at 6:53:44 AM

It's a slang for somebody fat. 子 does not carry a specific meaning it is more a character with grammatical function to nominative

by allan_s

1/31/2026 at 8:55:09 PM

胖 (pàng) means fat, vs 盘 (pán), which means plate.

Quite alright! We have to make mistakes to learn!

by dapangzi

1/31/2026 at 5:25:08 AM

the commenter's username (i'm guessing they mean 大胖子, feel free to google translate)

by dirteater_

1/31/2026 at 2:41:55 PM

This is the correct.

I was first called this by a Chinese classmate from Beijing with a biting sense of humor, when I was at university in Tokyo.

We got on really well, to be clear. :)

Hanging out with him was actually how I got started with Mandarin, probably why I chose this username.

by dapangzi

1/31/2026 at 4:17:34 PM

I remember when first learning Mandarin coming across a phrase '你发福了' which literally compliments someone on blessings (i.e. having become more wealthy) but idiomatically means you gained weight.

by rahimnathwani

1/31/2026 at 7:17:38 PM

I really like this one. It's delightfully cheeky. :)

by dapangzi

1/31/2026 at 7:48:56 AM

Super nice, thanks for sharing!

There's one thing that gave me pause: In the phrase 我想学中文 it identified "wén" as "guó". While my pronunciation isn't perfect, there's no way that what I said is closer to "guó" than to "wén".

This indicates to me that the model learned word structures instead of tones here. "Zhōng guó" probably appears in the training data a lot, so the model has a bias towards recognizing that.

- Edit -

From the blog post:

> If my tone is wrong, I don’t want the model to guess what I meant. I want it to tell me what I actually said.

Your architecture also doesn't tell you what you actually said. It just maps what you said to the likeliest of the 1254 syllables that you allow. For example, it couldn't tell you that you said "wi" or "wr" instead of "wo", because those syllables don't exist in your setup.

by yunusabd

1/31/2026 at 9:07:10 AM

I tried just repeating guó for as many times as symbols and repetition was not recognized.

Although I like the active aspect of the approach. Language apps where sound is the main form of learning should have a great advantage, as any written text just confuses as every country has its own spin on orthography. Even pinyin, despite making sense, for a beginner, has so many conflicting symbols.

by vjerancrnjak

1/31/2026 at 9:22:53 AM

> I tried just repeating guó for as many times as symbols and repetition was not recognized.

Can you elaborate? I'm not sure I understand.

by yunusabd

2/1/2026 at 2:43:48 AM

I think he's saying transliteration and romanization is horribly flawed in some instances.

by qingcharles

1/31/2026 at 9:06:13 AM

Impressive work! The idea and the UI is very intuitive.

Though, as a guy who speaks perfect mandarin from Beijing, I’m struggle even to pass the easy ones… So it can definitely used some improvements. The example 你好吃饭了吗 returns hào → hǎo, fān → fàn, le → liǎo. The first two are the model listen my tone mistakenly, and the last one should be le instead of liǎo in this context.

Also I see in the comment section people are worry about tones. I can guarantee tones are not particularly useful and you can communicate with native speakers with all the tones messed up and that’s perfectly fine. Because as soon as you leave Beijing, you’ll find all the tones are shuffled because of every region has their own dialect and accents, which doesn’t stop people from communicate at all. So don’t let tone stuff slow your learning process down.

by namelosw

1/31/2026 at 9:33:54 AM

Please allow me to share some of my views. I'm a native Mandarin speaker.

> I can guarantee that tones are not particularly useful and that you can communicate with native speakers with all the tones messed up, and that's perfectly fine.

Not at all. Tones are extremely important. If you have all the tones messed up, you can hardly communicate in Mandarin. It's true, as you said, that different regions of China have different dialects, and you'll find that people can communicate normally because: 1) The tonal differences in nearby regions are not too significant, and people can still try to understand based on context. And 2) In many cases, people switch to regular Mandarin when their dialects cannot communicate with each other. This is why Mandarin exists. It is an officially regulated dialect that all Chinese people learn, to solve the dialect problem among different regions. Chinese people may speak their own dialects at hometown, but when two Chinese people meet and find that their dialects cannot communicate, they immediately switch to Mandarin. Therefore, the tones in Mandarin are very important. To a considerable extent, Mandarin exists because of tones. You cannot communicate in it with messed up tones.

by tianqi

1/31/2026 at 10:56:33 PM

> If you have all the tones messed up, you can hardly communicate in Mandarin.

> To a considerable extent, Mandarin exists because of tones. You cannot communicate in it with messed up tones.

These statements are false. If they were true, it would be impossible to understand written tone-free pinyin; in reality, it's not just possible but easy.

by thaumasiotes

1/31/2026 at 8:47:49 PM

Well, as a northern guy, I do find myself able to understand Mandarin even from Yunnan easily without prior learning. The harder ones for me, like the Hefei dialect, are because the pronunciation is very different, not the tone. Nanjing dialect, on the otherhand, is also from the same Jianghuai Mandarin group as Hefei, which is perfect intelligentable for me.

Even for non-Mandarin/Guanhua, such as the Shanxi dialect, I can understand them because the pronunciation is much closer to mine, just the tones are completely novel.

by namelosw

1/31/2026 at 9:52:08 PM

Yes but Regular Mandarin has different tones, Beijing Mandarin is not Hong Kong-style Mandarin is not Taiwanese Mandarin and so when a foreigner chooses "Reference Mandarin", they are choosing what, exactly?

Point being, this idea of a Universal Reference is exactly the kind of linguistic erasure that is wrongheaded to begin with. Nor does this completely prevent comprehension, these debates underestimate how much human communication is contextual, you read what I wrote above and most of it was your mind already filling in (gasp, like an LLM) the next words enabling you to read relatively quickly.

by calf

1/31/2026 at 9:18:23 AM

As a person who lived in Taiwan and reached C1 in Chinese, I can also say that the tones are indeed less important than one might thing once one can say more and communicate more context. In the beginning when you're very limited in your expressive capacity and only can say simple sentences there's less context and getting the tones wrong does produce confusion.

"Because as soon as you leave Beijing, you’ll find all the tones are shuffled because of every region has their own dialect and accents, which doesn’t stop people from communicate at all. "

Isn't this in fact one of the reasons why China relies heavily on the written language because the different regions lose vocal communication ability as the changes in tones and pronounciations render the language understandable to people from other regions?

by samiv

1/31/2026 at 9:43:12 AM

The point about being a beginner and having limited capacity to express oneself is an important point. When you can say more, you will also have learned more about the language's tendency to use words of 2 syllables, rather than 1 syllable words. Using 2 syllables instead of 1 already removes a lot of ambiguity, and people will understand you better.

by zelphirkalt

1/31/2026 at 1:43:00 PM

> Also I see in the comment section people are worry about tones. I can guarantee tones are not particularly useful and you can communicate with native speakers with all the tones messed up and that’s perfectly fine.

That might be true between native speakers of similar enough dialects who otherwise speak "properly" with each other: proper grammar, idiomatic expressions, predictable accents (also regarding tones, which are not random, just different patterns from the standard). Language learners make errors in all these categories and there providing more motivation to neglect the tones is harmful. If tones were completely irrelevant regarding understandably then they would have disappeared long ago.

by samus

2/3/2026 at 1:08:18 AM

> If tones were completely irrelevant regarding understandably then they would have disappeared long ago.

Probably because it's a legacy and disappearing slowly? Modern Mandarin only has four tones left and has already lost tone patterns.

Do you know there's a "robot tone" in Chinese? It's simply swap every character to the flat or the first tone. Though it's under the stereotypical false assumption that robots have troubles with tones, kids in the late last century often communicated in that tone for fun without issues.

At the end of the day, vocal Chinese is always ambiguous with or without tones and in practice heavily relies on context. It requires written language to truly fix that.

by namelosw

1/31/2026 at 9:39:36 AM

About the tones not being as useful ... I think there are cases, in which they matter. Take for example 熊猫 and 胸毛: "有 xiongmao 吗？" "Are there Pandas? " or "Do you have chest hair?". Another one: 时间 and 事件. Sometimes it gets comical, but natives can and some will be confused, when your tones are off by too much, and the conversation just started, so that the context is not as narrowed down. Context is key in the language. You can notice that, when you are trying to join a conversation between natives. Until you understand a phrase or most of a phrase, that gives you a hint for the topic they are talking about, you will usually have a hard time understanding anything.

I just tried the tool and it couldn't properly recognize a very clearly pronounced "吃" and instead heard some shi2. I think it needs more training data or something. Or one needs a good mic.

by zelphirkalt

1/31/2026 at 10:40:23 PM

Hi, thanks for the feedback. The 了 issue was a bug on the JavaScript side; that should be fixed (training did thankfully handle it correctly).

The other two are probably things that could be fixed with a bigger and more varied dataset.

by simedw

1/31/2026 at 9:27:38 AM

I feel like there is a commonly mentioned idea that "speaking a foreign language is easier after having a drink or two".

I've found that especially true with Mandarin because (I think) a beginner speaker is more likely to speak a little more quickly which allows the listener to essentially ignore the occasional incorrect or slightly mispronounced tone and understand the what theyî're trying to say.

(This is anecdotal, but with n>1. Discussed and observed with other Mandarin language learners)

by mijoharas

1/31/2026 at 2:21:27 AM

Anyone that is a native European language speaker that hasn't tried to learn Chinese or some other tonal language, its really hard to understand how hard it is. The tones can really be very subtle, and your ear is not fine tuned to them. So you think you are saying it right, but native speakers have no idea what you are saying.

by ecshafer

1/31/2026 at 8:07:20 AM

The tones are really not as difficult as people make them out to be.

90% of the effort in learning any language is just learning massive amounts of vocabulary.

Things like tone and grammar are the very basics that you learn right at the beginning.‡ Beginners complain about them, but after a few months of studying Chinese, you should be fairly comfortable with the tones. Then, you spend years learning vocabulary.

The two things that make Chinese difficult are:

1. The lack of shared vocabulary with Indo-European languages (this obviously doesn't apply if your native language is something with more shared vocabulary with Chinese).

2. The writing system, which because it's not phonetic requires essentially the same level of effort as learning an entirely new language (beyond spoken Chinese).

‡. The same goes for grammar issues (like declension and conjugation) that people always complain about when learning Indo-European languages. These are the very basics that you learn early on. Most of the real effort is in learning vocab.

by DiogenesKynikos

2/2/2026 at 4:18:57 PM

>Things like tone and grammar are the very basics that you learn right at the beginning.‡ Beginners complain about them, but after a few months of studying Chinese, you should be fairly comfortable with the tones.

Disagree slightly with this- pronouncing the tones individually and getting to the point where you can be understood isn't too hard (well still hard), but combining them when speaking more quickly is more challenging, especially if you want it to flow nicely, and adding emphasis while maintaining the tones. Not that it's mandatory if you just want to understand/be understood, it depends on one's goals.

It's a common misconception that it's enough just to learn the tones and move on and it's very hard to find teachers who are able to help with more advanced pronunciation

by dtm987654123

2/3/2026 at 2:08:51 AM

I fully agree that a lot of the difficulty with the tones is in pronouncing them at pace, and in internalizing how they interact with one another.

However, this is still something that happens very early on when learning Chinese, and it takes nowhere near the same amount of invested time as learning thousands of vocabulary terms.

by DiogenesKynikos

1/31/2026 at 10:08:57 PM

Yours is the first comment I strongly agree with; as a multilingual/bicultural Asian American, children don't have this supposed difficulty hearing tones.

Most of it is passively paying attention. It should not be a struggle, it's one of those the more you struggle and overintellectualize the less time you are focusing on paying attention and letting your hearing ability do its work it was evolved to do.

The other thing is this whole emphasis on accents is misdirected. Teachers do not place this excessive emphasis on accents, it is people who want to sound "authentic" which is not a very wise goal of language learning in the first place.

I do think that learning music can help a little, especially a sonically complex instrument like violin and the like.

(caveat: I'm way oversimplifying on my Saturday afternoon, but that's my tentative views on this that I would try to argue for.)

by calf

2/1/2026 at 7:14:52 AM

I agree on not over-intellectualizing the tones.

I've seen people struggle to pronounce a word when I explicitly tell them what tones it contains, but then pronounce it perfectly when I ask them to just imitate me.

But I disagree about accents. One of the major flaws in most foreign language education, in my opinion, is that pronunciation is not emphasized heavily enough at the beginning. Being able to pronounce the basic sounds correctly has a huge impact on how native speakers perceive your language skills, even if you're not very advanced in the language.

by DiogenesKynikos

2/1/2026 at 10:09:54 PM

> Being able to pronounce the basic sounds correctly has a huge impact on how native speakers perceive your language skills, even if you're not very advanced in the language.

That's true, but it counsels against trying to develop better pronunciation early.

If you sound like a native despite having just started to learn the language, people will naturally conclude that you are mentally retarded.

by thaumasiotes

2/1/2026 at 11:07:28 PM

That's better than locking in a strong accent the rest of your life. Once you learn to speak a language, it's very difficult to fix your accent.

by DiogenesKynikos

2/2/2026 at 12:57:47 AM

There are two problems with this:

(1) It doesn't get any more difficult to fix your accent. But most people won't, because there's virtually no benefit to doing it.

This is related to

(2) Once you learn to speak a language, you're not at any risk of people thinking that you can't speak it, even if you speak with a strong accent.

by thaumasiotes

2/3/2026 at 2:09:42 PM

It does actually get much more difficult to fix your accent as you improve in a language. You have to significantly regress, slowing down your speech and taking pains to say everything correctly. You can lock in a good accent early on with much less effort.

There's really no risk in having too good of an accent early on. People will assume you're more advanced than you are, but once you tell them you're learning, they'll simply be impressed by your lack of an accent. There are worse things that could happen.

by DiogenesKynikos

1/31/2026 at 9:56:01 AM

> 2. The writing system, which because it's not phonetic requires essentially the same level of effort as learning an entirely new language (beyond spoken Chinese).

This is an interesting observation. Another one that I sometimes mention to my friends who didn't have an occasion to learn Chinese before is that in this language speaking, reading and writing are actually 3 separate components. You can read characters without knowing how to write them properly or even remembering them entirely. Lots of my Taiwanese acquaintances forget how to write certain characters, because nowadays most of the text they write is in bopomofo on their phones. Bopomofo represents sounds, so basically knowing how an expression sounds and being able to read the character (pick it from a set of given characters for the chosen sound) is enough to "write" it.

by snicky

1/31/2026 at 8:19:14 PM

Your comment is written as it learning a language was not a subjective experience, which could not be further from the actual thing

by Sxubas

2/1/2026 at 7:10:23 AM

Learning 10,000 words is objectively more difficult than getting used to tones.

You can get used to the tones in a relatively short amount of time. If you are in an immersive environment for a month or two, you will end up wondering how it is that anyone can't hear the tones.

In contrast, there is simply no way to memorize thousands of words in that timeframe.

by DiogenesKynikos

1/31/2026 at 7:47:16 PM

As a native Mandarin speaker, I always think the most difficult feature in English (and a few other European languages, like French) are the rich vowels. Like done vs down, beat vs bit, trailing dark l vs -ou/-u sound, and frequent vowel reduction in speech. Even worse, different English dialects randomly shift vowels (maybe like how Mandarin dialects use different tones). Neither my ear nor my mouth is tuned. From Wikipedia "English phonology":

> The number of vowels is subject to greater variation; in the system presented on this page there are 20–25 vowel phonemes in Received Pronunciation, 14–16 in General American and 19–21 in Australian English.

Native English speakers, if they are not teachers, tend to underestimate the challenge. I see YouTube videos that the western Chinese learner hypothesizes Spanish is most difficult for Chinese to learn because of the RR consonant -- I learned Spanish casually for a few years and I disagree. RR is difficult to pronounce, but I can clearly hear it and I won't confuse it with a different sound. In contrast to English, Spanish vowels are so easy.

by cvhc

1/31/2026 at 8:12:17 PM

Spanish is such a blessing as mispronouncing a word rarely changes the meaning.

Whereas in Chinese or to a lesser degree English, you have to very mindful on how you pronounce stuff.

As a native Spanish speaker the thing I dread the most is grammar and the absurd amount of verbal times there are. Even native speakers don't speak with perfect grammar.

by Sxubas

1/31/2026 at 3:59:54 AM

Agree. It’s really hard. It also explains why a lot of people born in China tend to make serious pronunciation errors when speaking English or German. They are used to focus on different things than us westerners.

It took me very long time to really understand how impersonating tone is in Chinese.

by vjvjvjvjghv

1/31/2026 at 8:18:46 AM

The reason why Chinese people have difficulty pronouncing Indo-European languages is that Chinese has a very limited set of syllables, and they always follow the pattern (consonant) + vowel + (nasal/rhotic consonant), with possibly one of the consonants being dropped.

Chinese does not have clusters of consonants like "rst" in "first." The closest thing in Chinese phonology to "first" would be something like "fi-re-se-te." If you grow up never pronouncing consonant clusters, they are incredibly difficult to learn.

This is all related to the existence of tones, but tones are not the direct reason why Chinese people have difficulty pronouncing words like "first." Tone provides one additional way of differentiating syllables, so Chinese can get away with having far fewer syllables than non-tonal languages. You essentially get 4-5 different versions of every syllable.

by DiogenesKynikos

1/31/2026 at 1:52:52 PM

> This is all related to the existence of tones, but tones are not the direct reason why Chinese people have difficulty pronouncing words like "first."

Actually they kind of are. The tonal system of modern Chinese dialects developed from voiced initial constants of syllables. Old Chinese (Han dynasty and older) might not have been a tonal language altogether. Many linguists think that they developed from final consonants that have since disappeared, and before that happened, yes, Chinese would have had (some) consonant clusters. But still nothing like essentially free-form syllables like other language families.

by samus

1/31/2026 at 2:55:56 PM

I said that the tones are not the direct reason.

They're indirectly related to the difficulty Chinese native speakers have with learning to pronounce Indo-European languages, in that the tones developed as Chinese syllables became more simple and restricted.

by DiogenesKynikos

1/31/2026 at 2:34:57 AM

I'm a native Russian speaker, and I decided to learn Mandarin, because it's linguistically almost the opposite of Russian.

I had no problems with tone pronunciation, but tone recognition was indeed much trickier. I still often get lost when listening to fast speech although I can follow formal speech (news) usually without problems.

by cyberax

1/31/2026 at 6:00:10 AM

I recently started learning a tonal language, and so far have not struggled too much wrt tones when everything is slow. There was an original strangeness and refusal for my vocal cords to want to work that way, but probably only for the first month or so.

At least, this is the case for slow text. Once the text is sped up it’s amazing how my brain just stops processing that information. Both listening and speaking.

I’m sure this will come with practice and time but for now I find it fascinating

by barrell

1/31/2026 at 8:38:19 AM

Euro speaker here, no problem with recognising tones but speaking them…:/

by thenthenthen

2/1/2026 at 10:26:06 PM

Are you studying a language with contour tones or with high/mid tone distinction? I tried to study a bit of Thai, and the high/mid tone distinction was a complete show-stopper for me.

by cyberax

1/31/2026 at 3:07:57 AM

For someone who hasn't grown up speaking an language with tones or pitches, the process of learning them can be maddening. I applaud anyone who makes tools like this to try to make the process easier.

My experience in learning Japanese pitch accent was eye-opening. At the start, I couldn't hear any difference. On quizzes I essentially scored the same as random guessing.

The first thing that helped me a lot was noticing how there were things in my native language (English) that used pitch information. For example, "uh-oh" has a high-low pitch. If you say it wrong it sounds very strange. "Uh-huh" to show understanding goes low-high. Again, if you reverse it it sounds unusual.

The next part was just doing lots of practice with minimal pairs. Each time I would listen and try my best to work out where the pitch changed. This took quite a lot of time. I feel like massed practice (many hours in a day) helped me more than trying to do 10 minutes regularly. Try to hear them correctly, but don't try too hard. I didn't have any luck with trying harder to 'understand' what was going on. I liken it to trying to learn to see a new color. There isn't much conscious thought.

The final piece of the puzzle was learning phrases, not individual words, that had pitch changes. For example: "yudetamago" could be boiled egg or boiled grandchildren. Somehow my brain just had a much easier time latching on to multi-word phrases instead of single words. Listening to kaki (persimmon) vs kaki (oyster) again and again seemed much harder.

Of course, your mileage may vary with these techniques. I already spoke decent Japanese when I started doing this.

by laurieg

1/31/2026 at 6:05:56 AM

> For example, "uh-oh" has a high-low pitch. If you say it wrong it sounds very strange. "Uh-huh" to show understanding goes low-high. Again, if you reverse it it sounds unusual.

Wow… Thanks for making it clear that English also has tones! I hadn’t thought of it this way before. “Uh-huh” sounds similar to Mandarin tones 3 & 2. “Uh-oh” is similar to Cantonese tones 1 & 3.

I’m wondering if we can find good examples to teach the Mandarin tones. I think two or three syllable words are best because it illustrates the contour of the tones.

by ronyeh

2/1/2026 at 10:05:31 PM

Pitch levels are important enough in English that native speakers spontaneously develop ways to write them down, even though the standard written language has no way to indicate them.

However, they operate at the level of the sentence rather than the individual word, which sets up a conflict if an English speaker wants to learn Chinese.

The most common uses of pitch in English are to annotate the grammatical structure of a sentence, making it clear which words belong together in larger phrases, and to mark yes/no questions.

English does have one clear example of lexical tone, the "I don't know" word, which is pronounced very similarly to the Mandarin pinyin éēě. (If pronounced with the mouth open. With the mouth closed, it would be more like 嗯嗯嗯 in the same 2-1-3 tone sequence.)

by thaumasiotes

1/31/2026 at 3:44:50 AM

Wholeheartedly (or maybe downheartedly?) agree with this - sometimes I try to say the simplest things and people just stare at me like I'm speaking Martian. Which I suppose I might as well be! One of my big problems is implicit use of tones for things like expressing uncertainty; that's a very difficult habit to get out of.

by danparsonson

1/31/2026 at 4:53:56 AM

Another one that I wish I had realized sooner is that, contrary to the impression teachers tend to convey, tones aren’t just a pitch contour thing. There are also intensity and cadence elements. Native speakers can fairly accurately recognize tones in recordings that have had all the pitch contour autotuned out.

by bunderbunder

1/31/2026 at 3:03:59 AM

its critical because without proper tonal enunciation the words can be ambiguous.

by dionian

1/31/2026 at 4:02:53 AM

Well, it would work only when I speak word by word, not as a sentence or in a normal speed for daily conversations. The model thinks I was making mistakes when I speak casually (as a native Chinese speaker, I had Mandarin 2A certification, which is required for teachers or other occupations that requires a very high degree of Mandarin accuracy). You wouldn’t really notice it but language pronunciations is very different between causal and formal speech…

by tifan

1/31/2026 at 1:32:18 AM

When I was living in Taiwan, one of the ways I forced myself to remember to pronounce the tones distinctly was by waving my hand in front of me, tracing the arc of each character’s tone.

It helped a lot even if I did look like an insane expat conducting an invisible orchestra.

One more thing: there's quite a bit of variation in how regional accents in the mainland can affect tonal pronunciation. It might be worth reaching to some native speakers to give you some baseline figures.

by vunderba

1/31/2026 at 2:16:38 AM

In a university Mandarin class, one of the adult students (i.e. probably 40 or so) WAY over exaggerated his tones, to the point that the little old lady teaching us laughed out loud after one of his answers.

A few years later, he had the most clean and consistent pronunciation out of anyone I'd been in a class with, and easily switched between the Beijing and other accents depending on which teacher we had on any given day.

I rather regret not emulating him, even though I haven't really used it for nearly 20 years and have forgotten most of it.

by zdragnar

1/31/2026 at 2:19:56 AM

From a language learning standpoint that does make sense. Over-exageration while you are learning to help cement the idea, and then when you are speaking more naturally you will fall back into a regular kind of tone.

by ecshafer

1/31/2026 at 6:58:22 AM

Over-exaggeration also works well when learning to play stringed instruments like cello.

by mleonhard

1/31/2026 at 3:06:25 AM

that's EXACTLY how I taught myself to speak with a Spanish accent from Madrid. I repeated the way tv celebrities and the speakers on the metro announced the stations, and it gave me a base for how to use my mouth and throat appropriately. After a while I was able to tone it down and my accent got so good that locals couldn't tell I wasn't spanish - I had this cool party trick pulling out my id and showing them I was truly a foreigner!

by luckydata

1/31/2026 at 2:36:52 AM

Hand motions help! Especially when you want to memorize new words, because initially you need to treat tone as something additional to remember.

I used simple index finger motions to mark tones.

by cyberax

1/31/2026 at 1:45:06 AM

For accents, I’ve mostly tested with a few friends so far. I’m wondering whether region should be a parameter, because training on all dialects might make the system too lax.

by simedw

1/31/2026 at 7:19:06 AM

Probably be a lot of work but it would be really interesting if you had sufficient data sets to train across accents.

Highly recommend taking a look at Phonemica for this:

https://phonemica.net/

by vunderba

1/31/2026 at 2:27:52 AM

This sounds like how solfeg training works. You use a hand signal to indicate a specific tone: do re mi fa so la ti

by devin

1/31/2026 at 4:37:27 AM

This is very cool, but from one Mandarin learner to another I’d caution against relying too heavily on any external feedback mechanism for improving your pronunciation.

If you can’t easily hear your pronunciation mistakes so clearly it hurts, consider putting more energy into training your ear. Adult language learners usually have brains that have become resistant to, but not incapable of, changing the parts of the brain responsible for phoneme recognition. The neuroplasticity is still there but it needs some nudging with focused exercises that make it clear to your brain exactly what the problem is. Minimal pair recognition drills, for example, are a great place to start.

It’s not the most fun task, but it’s worth it. You will tighten the pronunciation practice feedback loop much more than is possible with external feedback, so a better accent is the most obvious benefit. But beyond that, it will make a night and day difference for your listening comprehension. And that will get you access to more interesting learning materials sooner. Which hopefully increases your enjoyment and hence your time on task. Plus, more accurate and automatic phoneme recognition leaves more neurological resources free for processing other aspects of your input materials. So it may even help speed things like vocabulary and grammar acquisition.

by bunderbunder

1/31/2026 at 6:20:27 AM

I’m building a language learning app [https://phrasing.app] and this is really good advice. I’ve not had any interest in SST for the application, and have no plans to integrate it. In my experience, I’ve never seen them be truly beneficial in the language learning process.

What has been extremely beneficial has been having the text and audio forced aligned and highlighted, kareoke-style, every time I hear the audio. It has improved my phoneme recognition remarkably well with remarkably little content. Several users also report the same thing - that even native speech feels a lot more like separate words than just a slew of sounds. I attribute this in large part just due to this kareoke style audio. It works better for phonetic scripts, so I would recommend using this with pinyin/jyutping/furigana for character based languages.

For production, when I was at Regina Coeli (world-class language institute) their main thing was just 1. you hear a short passage in Dutch, 10-40 words 2. you record yourself reading the same passage and 3. you play back the two audio tracks on top of one another and listen for the difference. Optional step 4. Re-record and replay until it’s close enough.

There was no grading, no teacher checking recordings, no right or wrong; just hundreds of random sentences and a simple app to layer them. You needed to learn to hear the differences yourself and experiment until you no longer could. (fwiw this is not present in phrasing, I just found it relevant. One day soon I hope to add it!)

by barrell

1/31/2026 at 5:15:16 AM

I completely agree with this. There's a certain confidence you get when you can hear a word you don't know, but can still comprehend it well enough to know what pinyin to type into your dictionary app. Mandarin Blueprint has a nice pinyin pronunciation video on YouTube that I worked through a while ago, and then followed with a few weeks of immersion in Taiwan, I was able to really pick out what people were saying.

I feel like listening is the key to speaking. You don't necessarily need to rote learn the tones for each word. You just need say words as you hear them spoken by others.

by zdc1

1/31/2026 at 1:36:45 AM

This is incredible. When I was first learning Chinese (casually, ~20 years ago), my teacher used some Windows software that drew a diagram of the shape of my pronunciation, so she could illustrate what I was getting wrong in some objective way.

The thing you've built is so good, and I would have loved to have it when I was learning Mandarin.

I tried it with a couple of sentences and it did a good job of identifying which tones were off.

by rahimnathwani

1/31/2026 at 7:53:30 AM

You're probably thinking of Praat, which is still around. Even has the same UI as 20 years ago.

by yunusabd

1/31/2026 at 4:11:28 AM

I wish this had a pinyin mode…! I am learning to speak Mandarin but I am not learning to read/write.

( I’m learning using a flashcards web app I made and continue to update with vocab I encounter or need: https://memalign.github.io/m/mandarin/cards/index.html )

by memalign

1/31/2026 at 4:12:36 AM

same! but if you get it inevitably wrong the first time it gives you the pinyin. but i struggled to get it to transcribe the consonants I was making let alone the tones. i'm pretty sure i'm not as bad as that!

by data_ders

1/31/2026 at 11:20:57 PM

Great suggestin, added a toggle to see pinyin.

by simedw

1/31/2026 at 8:55:40 AM

+1 for pinyin

by siwatanejo

1/31/2026 at 8:56:01 AM

+1

by knocte

1/31/2026 at 12:57:18 PM

As a native speaker of Mandarin the demo it's not work for me. It can't check the pronounce of my voice. I don't know what's wrong of it, may be it's too sensitive(my daughter watch carton on my side).

by alixwang

1/31/2026 at 2:07:01 PM

It’s fairly sensitive to background noise at the moment. I’m planning to train an improved version with stronger data augmentation, including background noise.

by simedw

1/31/2026 at 2:02:37 AM

This is extremely cool, although I asked my wife (who is Chinese) to try it out and it said she made some mistakes.

by affogarty

1/31/2026 at 5:09:01 AM

I tried it out and it has some issues with my native speech. I grew up with more Taiwan mandarin but I know the Beijing standard and the recognizer was flagging some of my utterances incorrectly.

by hawflakes

1/31/2026 at 9:54:09 AM

I think this is a good time for a shameless plug. The last 2 month or so I am working on my own project [1] for learning more characters. I have made a tool with powerful search function, training mode, and other useful features, such as displaying plots that show you your progress and whether you are reaching your daily training goal, and the ability to save searches, a la Thunderbird saved filters. It is written in Python and oldschool tkinter with custom widgets for a somewhat more modern and capable feel. It is very configurable. Though currently configuring it means touching a JSON file, as I have not yet bothered writing GUI for that.

I am mostly developing this for myself, to have the perfect tool for me, but I dare say, that I have not seen anything comparable and that I let my 10y+ experience in learning Chinese influence my design decisions. Oh, and it is free /libre software of course (AGPL). It comes with an ever improving vocabulary file that has tons of metadata about words, their usage, how to memorize them, etc. under ODbL (open database license).

[1]: https://codeberg.org/ZelphirKaltstahl/xiaolong-dictionary

by zelphirkalt

1/31/2026 at 10:05:29 AM

Good to see that there are others learning and creating! Another shameless plug for my translator site: https://pingtype.github.io

It takes text, adds colours for tones, pinyin, literal, and parallel translations.

There’s also a character decomposition tool at the bottom of the page which can be helpful if you’re able to recognise half a character but can’t remember the pronunciation for typing it.

The YouTube channel has some song lyrics, movie subtitles, and audio Bible that might help with learning.

by peterburkimsher

1/31/2026 at 12:36:08 PM

Also I just read some of your blog about learning Chinese :) Haha, I can totally relate to some of it. What I noticed is, that when I speak Mandarin with locals (on vacation, because I am not living there), they are always super happy, that I speak their language and they make an effort to speak it with me. This might be dependent on the region one is in. From your writing I would guess you might be in Taiwan or HK, and while I have been in HK, I have never been in Taiwan and I don't know how people handle it there. I have mostly been in southern China and it's always been great and an overwhelming amount of people were very friendly and welcoming. Of course living there and traveling there for a while are 2 different things and experience might differ. If you happen to visit Berlin, feel welcome to visit our Chinese language meetup (https://dragon-descendants.de/en/) and if you want you can ask for me, 小龙.

by zelphirkalt

1/31/2026 at 12:26:18 PM

Wow, the tool for decomposing characters is very cool! I assume you are talking about the thing that appears, when I click "Matrix"? I think it would be good to have "decompose characters" somewhere. But I might actually use this to get the component characters. In my app in my vocabulary file I also have tags for words, which are like "component:<component here>", so that if one knows how parts of a character, one could also search for it, without knowing its pinyin, by searching for "tags contain component1 and contain component2 and ...". I might add more component tags using your tool.

What I noticed though is, that some of the components don't seem to be like what I would expect to be shown as components. For example I tried the word 衣服 and 服 is shown to have the component "二". I guess one could see it that way, but some other dictionaries stop at 月 which itself is a component with set meaning (moon) and usage as radical (often for body parts). My favorite online normal dictionary for example: https://www.mdbg.net/chinese/dictionary?page=worddict&wdrst=... (hover over 3 dots of character and click the button with the 字 and scissors to see decomposition) says:

    服 = 月 + 𠬝
    𠬝 = 卩 + 又
If you go further, wouldn't you also have to decompose "二" into "一" and "一"?

A Chinese teacher told me there are various approaches for decomposition, so this might not be a science or that rigorous, but I think consistency would then dictate, that you decompose "二" as well. I don't always agree fully with their decomposition either and usually I stop at any component, that still has meaning by itself, which can be pretty low level 1 or 2 strokes components already. For determining that, I also use information from a language school, which I copied into a repo: https://codeberg.org/ZelphirKaltstahl/language-learning/src/... "All radicals from their website". Also useful for memorizing the characters, if one can derive a mnemonic for a character from its components and their meaning.

The advanced UI looks very complex, but I don't mind that. In fact it is quite cool! Just has some stuff I don't even know what it is about. I noticed, that once one toggles the advanced UI, I didn't find a way to toggle it back to simple again.

Bookmarked!

by zelphirkalt

1/31/2026 at 8:21:20 PM

Thanks for your long and thoughtful reply!

Matrix is just a visualisation tool, I never actually found a practical use for it other than looking cool.

The decomposition feature is at the bottom of the page below the generated HTML. It's the text box with "隹" and a Search button. Clicking Search will show the 2 parts of the character, and all characters that contain that radical (䧶, 䳡, etc), and all multi-character words containing that character.

Clicking any of the related characters (or numeric codes for radicals that don't have a Unicode representation) will then show the genealogy for that character.

See "copying from images" in http://localhost/pingtype/docs/docs.html

If I ever come to Berlin then your meetup sounds fun! I'm pretty far away though; I live in New Zealand now.

All the best with your learning, I hope you keep making progress!

by peterburkimsher

1/31/2026 at 5:00:27 AM

This is really cool. Thank you for sharing. Before now I had not sought to understand how this technology works under the hood, but seeing it done at this scale made me curious to see if I could do something similar.

by frozennothing

1/31/2026 at 3:13:44 AM

This is amazing. I'm also working on free language learning tech. (I have some SOTA NLP models on huggingface and a free app.) I have some SOTA NLP models on huggingface and a free app. My most recent research is a list of every phrase [0].

Pronunciation correction is an insanely underdeveloped field. Hit me up via email/twitter/discord (my bio) if you're interested in collabing.

[0]: https://gist.github.com/anchpop/acbfb6599ce8c273cc89c7d1bb36...

by ChadNauseam

1/31/2026 at 3:22:25 AM

How difficult would it be to adapt this to Cantonese? It is a surprisingly difficult language to learn. It has more tones than Mandarin plus comparatively less access to learning resources (in my experience)

by stuxnet79

1/31/2026 at 6:36:08 AM

Unlike Mandarin and other Chinese languages, Cantonese does not have tone sandhi and has changed tones instead.

Cantonese tones are also different from those of Mandarin, so no, it can't be adopted for Cantonese and it would require a complete rework.

> It is a surprisingly difficult language to learn.

I keep hearing this quite a bit, but I do not find Cantonese to be any more difficult than most languages[0]. Or at least we would need to define a metric based on which we could assess the difficulty. If it is the number of tones, their number (six – no, not nine) may look formidable at first, but they are, in fact, rather simple tones and broadly fall into three categories: flat, rising, and falling. As a random example, Cantonese does not even have a dipping tone.

In comparison, «fancy» tones of Vietnamese are significantly more challenging or even difficult – they can curl and unfurl (so to speak).

[0] That crown appears to belong to Archi, with honourable mentions going out to Inuit, Basque, Georgian, Navajo, Yimas and several other polysynthetic languages.

by inkyoto

1/31/2026 at 7:52:57 AM

Cantonese is "hard" mainly for two reasons-

1. tones, and generally the gatekeeping of some Cantonese communities towards people who haven't gotten the tones completely right

2. the lack of learning materials relative to the number of speakers, the confusion between written Chinese and written Cantonese (and also the general lack of the latter)

As they say, "a language is a dialect with an army and navy"... I'll leave it at that.

by hnfong

1/31/2026 at 10:30:37 PM

You seem to be confusing/overgeneralizing the understandable resentment of "some Cantonese" who likely had bad experiences of postcolonialism and/or authoritarian-revanchist state policies. If Hong Kong diaspora has a poor reception towards newcomers to their local microculture, maybe it's because the people attempting to engage are not treading lightly with those actual historical legacies in mind.

by calf

2/1/2026 at 5:44:01 PM

"Taiwanese lectures Hong Konger about Hong Kong" is a recurring meme on Threads among local Hong Kongers. I didn't expect I'd experience one here.

I mean, I know I am supposed to refute your point with rational points, but I really don't know what to say except that you're wrong, and you're confusing the cultural divide between Cantonese speakers and non-Cantonese speakers, and the political tensions between Hong Kong and mainland China.

Note that I never said "Hong Kong" in my comment because the majority of Cantonese speakers are actually in mainland China.

by hnfong

2/1/2026 at 4:36:48 AM

Given that linguistics does not have a concept of what makes a language «hard» or not, the language hardness classification is highly subjective and perceptional.

I have already commented on why I do not think that Cantonese tones are hard, so I will leave it at that – it is the first, oft repeated myth that is not based on facts.

> 2. the lack of learning materials relative to the number of speakers […]

On the subject of the availability of learning materials, there would have been a strong case for, e.g. Wu (Shanghainese), Min (Hokkien), Hakka etc – for all of which the learning materials virtually do not exist, and that is true.

With Cantonese, it is a remarkably different situation. My local bookshop has two large shelves stacked with Cantonese textbooks and dictionaries that suit a range of people from vastly different age groups – from toddlers starting to babble to serious advanced learners and anyone in between. More is available online, e.g. Virginia Yip's Routledge series, which includes a comprehensive book on the Cantonese grammar of rarely seen quality and coverage, Robert Bauer and Victor Mair's «ABC Cantonese-English Comprehensive Dictionary», and many more. There are online resources, an open-source, cross-platform «Jyut Dictionary», Google and Apple support the Cantonese keyboard etc.

If their printed versions are not easily locally available, they can be purchased as Kindle books as well.

Granted, Mandarin surpasses Cantonese in terms of the quantity of learning materials, and that is a dry fact.

> […] the confusion between written Chinese and written Cantonese […]

Many languages have quirks or come with a wealth of idiosyncrasies when it comes to how the language is spoken and written down. Burmese, Thai, and Tibetan, for example, are written according to extremely archaic pronunciation rules to the point that spoken and written languages have to be learned separately.

Written Cantonese has existed since at least the Ming dynasty[0][1], but the reasons why there are two distinct forms are entirely different as they go back to replacing Classical Chinese, which had become incomprehensible to anyone in the late 19th century without years of dedicated study, with a modern standard written standard based on northern Chinese varieties.

> […] (and also the general lack of the latter).

This is the second often repeated myth. Many Cantonese speakers believe that Cantonese can only be spoken but not written down, which is patently false – if a language has a writing system, it can be written down with it. When pressed with question «why do you think so», there is typically no answer or «because we have been told so». 口語粵語好容易用漢字寫低，就好似書面粵語咁。 There is a real issue of some native Cantonese words not having dedicated Chinese characters for them, but it is more of a philosophical disgreement between the academics rather than an insurmountable problem.

So, in reality – at least in Hong Kong – since formal literacy has long meant competence in Standard Written Chinese, not in a full Cantonese-written system, schools and institutions tend to penalise written vernacular Cantonese forms in formal contexts – entirely for non-linguistic reasons as explained in [2].

To sum it up, I do not find any of the counterarguments to be compelling, persuasive or supported by linguistic facts which would make Cantonese a «hard» language.

[0] https://www.fe.hku.hk/clear/doc/WC%20and%20Implications%20fo... – «The story of written Cantonese begins in the Ming dynasty with texts printed in woodblock print books called wooden fish books (木魚書)»

[1] https://cantoneseforfamilies.com/cantonese-vernacular-and-fo...

[2] https://hkupress.hku.hk/image/catalog/pdf-preview/9789622097...

by inkyoto

2/2/2026 at 7:11:52 AM

You both are in violent agreement and it is amusing to see in the wild.

As an 外國人 who learned Cantonese as an adult (I moved to HK) I'm jealous of the quantity and quality of materials that exist for learning (not Cantonese). That being said, there are _enough_ materials so it's nowhere near as rough as e.g. Shanghainese.

My opinions on hard language reduces to "is this the first language you're learning from a particular language family?" If so, it's hard to learn. But "is ontologically hard" isn't something that I think is really worth ranking. Any four year old can speak their mother tongue just fine.

But the perception of "hard to learn" did work in my favor for learning Cantonese: as a 鬼佬 who speaks Cantonese I was given lots of latitude to be bad while learning because of that perception. And now I could go back and learn Mandarin now and it would be _much_ simpler than the task that I had in learning Cantonese.

That being said I still write in 口語. Slowly learning 書面語 as I read more and more of it.

by nathanhammond

2/2/2026 at 8:06:16 AM

Hi Nathan, long time no see! :)

(Not sure if you remember or recognize me from this handle. I was with Chaak on the words.hk project . Also Jon spoke highly of you for helping with the tough problems on the fonts :D )

by hnfong

2/2/2026 at 1:28:03 PM

I did guess it was you; but wasn't sure. :P

by nathanhammond

2/1/2026 at 5:31:52 PM

You're absolutely right in theory and in linguistics.

The issue is that among the more common languages that people (outside of language nerds) tend to learn, what I said still holds true for the average learner who's there to learn and whom face the practical difficulties of learning a language, and none of your totally correct linguistic facts really make them less real.

> > […] (and also the general lack of the latter).

> This is the second often repeated myth

The size of written Cantonese corpora was abysmally small up until recent (<10?) years, and much of the content was interwoven with Standard Written Chinese. You still generally can't find written Cantonese on printed materials. Until recent months, LLMs couldn't even write a proper children's story in Cantonese without inadvertently code switching to SWC.

Trust me when I say I'm one of the many people who worked hard to make this "myth" not true (not in linguistic theory but in practice). I never knew it would be thrown back to me like this as a lecture on a random forum lol.

There's a lot more to be done to make Cantonese an assessable language for learners compared with the other major languages. You can compare the linguistic properties of languages all you want, and you'd be absolutely right, but that doesn't make a difference to the prospective learner at all.

by hnfong

1/31/2026 at 2:37:56 PM

How do you actually go about training specialized speech models? Let's say you have a language dialect you want to specialize on, or a pidgin English from West Africa, or a regular language but with highly specialized terminologies being used.

Just curious - would you need insane HW infrastructure to begin with, or hosted/managed. And what tooling is preferred by the industry for the "training"?

by sgt

1/31/2026 at 4:03:29 AM

> And if there’s one thing we’ve learned over the last decade, it’s the bitter lesson: when you have enough data and compute, learned representations usually beat carefully hand-tuned systems.

There are still holdouts!

Come back to me in a couple of decades when the trove of humanity's data has been pored over and drifted further out of sync with (verifiable) reality.

Hand-tuning is the only way to make progress when you've hit a domain's limits. Go deep and have fun.

by rablackburn

1/31/2026 at 4:52:23 AM

Have you tried the Azure Speech Studio? I wonder how your custom model compares to this solution.

I played around with python scripts for the same purpose. The AI gives feedback that can be transformed to a percentage of correctness. One annoyance is that for Mandarin, the percentage is calculated at the character level, whereas with English, it gives you a more granular score at the phoneme level.

by cocoa19

1/31/2026 at 5:36:34 AM

IMO the SotA for this is https://www.speechsuper.com/. Amazon suffers for similar

> One annoyance is that for Mandarin, the percentage is calculated at the character level, whereas with English, it gives you a more granular score at the phoneme level.

This is the case for most solutions you'd find for this task. Probably because of the 1 character -> 1 syllable property. It's pretty straightforward to split the detected pinyin into initial+final and build a score from that though.

by dirteater_

1/31/2026 at 3:18:51 PM

This thread is like a diamond to me because I have been thinking about building almost the same thing for English tones. I need a model like this.

I'm sure there are a bunch of apps out there that claim they do the same thing, but they don't, IMO. Even if they do, as you said, where is the fun in that?

Great post, thanks for it!

by erdemo

2/2/2026 at 12:15:59 PM

Great idea and effort, thanks for sharing. It is even way more strict than my native chinese tryarounds :D

by holg

1/31/2026 at 5:28:24 PM

This is fantastic. Been looking for a way to get feedback on my pronunciation since I came back from Shanghai and haven't been seeing native speakers every day. Is there any plan to make this a download for desktop or mobile? Would be using it weekly to get back up to par on Mandarin

by ctkhn

1/31/2026 at 1:48:07 AM

instantly awesome.

I suck at chinese but I want to get better and I'm too embarassed to try and talk with real people and practise.

This is a great compromise. even just practising for a few minutes I already feel way more confident based on its feedback, and I feel like I know more about the details of pronunciation.

I'm worried this might get too big and start sucking like everything else.

by drekipus

1/31/2026 at 11:30:45 AM

Super interesting project. Curious about the data collection - did you record yourself, use existing datasets, or both? I've been thinking about building something similar for Hebrew vowels (which are often omitted in writing). Would love to hear what the hardest part of the pipeline was.

by kris_builds

1/31/2026 at 3:44:46 PM

I wish this were available for more languages! It would also be neat to estimate the native language of the speaker, given their pronunciation of the target language, and propose a prioritization of the pronunciation mistakes the language learner should work on first.

by alexandermorgan

1/31/2026 at 6:41:46 AM

Very cool. As a super newbie who's only made it to Pimsleur 15 and only for the speaking, it would be cool to have a pinyin text entry and so on. In the end, I just type into ChatGPT what I want and paste it in your box so it's not a big deal.

by arjie

1/31/2026 at 9:08:05 AM

This is a very cool to have! Thanks for putting the time to build it.

For me it doesn't work very well. Even easy phrases like 他很忙 get transcribed completely random "ma he yu". Is it maybe over-fitted to some type of voice?

by redleader55

1/31/2026 at 11:04:37 AM

Can the implementation used here for tone and pronounciation apply for Music?

It would be cool if a model could tell you if you are singing or playing a piece of music with the right intonation and other ways.

by tomaytotomato

1/31/2026 at 7:28:14 PM

Any plans on releasing the inference/training code?

by jainaayush05

1/31/2026 at 6:06:26 AM

It might be a mic issue but my wife, who is a native speaker, seems to get most characters wrong. I will try again later in a quieter place to see if that helps.

by olalonde

1/31/2026 at 7:35:02 AM

I'm also working on a Chinese learning app (heyzima.com) and my "solution" to this was to use the TTS token/word log probabilities.

by sim04ful

1/31/2026 at 3:09:08 AM

Neat. A personal tone trainer. Seriously, shut up and take my money now. Of course, it needs a vocabulary trainer, and zhuyin/traditional character support.

by byb

1/31/2026 at 7:59:48 AM

Cool! I'm not great at Chinese but I have to speak slowly for it to recognize the tones/words. I wonder how fast the training data is.

by JCharante

1/31/2026 at 2:58:14 AM

Interesting application! A friend of mine built a model like this to help her make her voice more feminine, and it is neat to see a similar use case here.

by jrockway

1/31/2026 at 3:35:40 AM

For people trying to say the "j" sound correctly, as in "jiu" (old), just say "dz", so in that example "dziu"

by baby

1/31/2026 at 3:00:30 AM

it heard wu2 but i heard wo2 from you fine. and it should sound like wo2 not wo3 if spoken quickly. not a native speaker though so i could be wrong

by dionian

1/31/2026 at 3:40:15 PM

Wow, I was going to make something almost exactly like this! Really cool work and thank you for sharing

by namr2000

1/31/2026 at 2:25:51 AM

great work! I am going to try it out. Currently about to learn some Mandarin to be able to talk with hawker stand owners for a trip I am doing soon. I am trilingual and can speak a few languages on top of that, but none of them tonal. I am new to tonal languages and I find myself struggling with this... a lot!

by bytesandbits

1/31/2026 at 2:33:00 AM

goof luck! I speak 6 languages fluent but none of them tonal and I find mandarin very challenging; it does not help that people in places where you might need it are not very forgiving; asking for green fork in a tea shop has people very bewildered.

by anonzzzies

1/31/2026 at 4:05:55 PM

Suggestion: in addition to the microphone input, allow the user to upload an audio file.

by while_true_

1/31/2026 at 4:57:24 PM

How do you know that what it tells you is correct if you can't hear it yourself?

by eudamoniac

1/31/2026 at 11:24:04 AM

Cool. Would love a write up about how you did it if you have time

by victorbjorklund

1/31/2026 at 11:32:00 AM

+1 on wanting a writeup. The model architecture choices alone would be interesting - did they use a transformer, CNN, or something hybrid? And how they handled the tone pair ambiguities... Would read that blog post for sure.

by kris_builds

1/31/2026 at 2:00:33 AM

The article mentions the bitter lesson. I'm confused about the status of Sutton's opinion of the bitter lesson. On the one hand, he invented the concept. On the other hand, he appears to be saying that LLMs are not the correct approach to artificial intelligence, which to a naive outsider looks like a contradiction. What gives?

by btrlsnqtn

1/31/2026 at 6:36:32 AM

Maybe he means that LLM will hit a ceiling glass or that the "right" approach will give equivalent with less training/less intensive compute requirements ?

by allan_s

1/31/2026 at 7:52:42 AM

Very cool ! Will you make the source available as well?

by mentalgear

1/31/2026 at 9:24:43 PM

I am a huge, huge AI hater. I hate, hate, hate all the "Show HN: My Latest AI Slop App That Sucks and Required No Creativity to Think Up or Vibe Code and is Useless and I am a Useless Void of a Person for Having Created It." I say that to give context to say that this is the first legitimately useful "Show HN" I have seen in this AI sphere. It's really great, it seems to work quite well (I am an amateur mandarin speaker, I "know" about 5,000 words, so can vaguely judge) and fulfills a legitimate use case. I would pay you to use this once the model improves a little bit. It's really fantastic. You did well.

by irl_zebra

1/31/2026 at 6:30:13 AM

Nice! I need something similar for english now

by martianlantern

1/31/2026 at 9:09:20 PM

Unclear if it wants 媽媽 / 妈妈 as:

- māmā (incorrect)

- māma (correct)

by cheonn638

1/31/2026 at 1:09:55 PM

This is sick... you can just do things :D

by maximedupre

1/31/2026 at 1:25:53 AM

This is amazing, if you feel like opening an entire language to being learned more easily.. Farsi is a VERY overlooked language, my wife/her family speak it but it's so difficult finding great language lessons (it's also called Persian/Dari)

by jellojello

1/31/2026 at 1:37:06 AM

Thank you.

I had a quick look at Farsi datasets, and there seem to be a few options. That said, written Farsi doesn’t include short vowels… so can you derive pronunciation from the text using rules?

by simedw

1/31/2026 at 1:55:15 AM

> written Farsi doesn’t include short vowels… so can you derive pronunciation from the text using rules?

You can't, but Farsi dictionaries list the missing short vowels/diacritics/"eraab" for every word.

For instance, see this entry: https://vajehyab.com/dehkhoda/%D8%AD%D8%B3%D8%A7%D8%A8?q=%D8...

With the short vowel on the first letter it would be written حِساب (normally written as just حساب)

The dictionary entry linked shows that there is a ِ on the first letter ح

But you would have to disambiguate between homographs that differ only in the eraab.

by kranner

1/31/2026 at 10:15:13 AM

I made a parallel literal translator for Farsi:

https://pingtype.github.io/farsi.html

Paste in some parallel text (e.g. Bible verses, movie subtitles, song lyrics) and read what Farsi you can on the first line, looking to the lower lines for clues if you get stuck.

The core version of Pingtype is for traditional Chinese, but it supports a few other languages too.

by peterburkimsher

1/31/2026 at 2:39:56 AM

talk about 30 seconds to wow. great app, UX and demo. would love to use this. kudos.

by nirvanatikku

2/1/2026 at 1:31:39 AM

is there a English or Japanese learning model like this?

by somesun

1/31/2026 at 7:15:37 AM

What a brilliant project!

by felixbecker

1/31/2026 at 10:23:14 AM

Man, get a girlfriend.

by contingencies

1/31/2026 at 2:39:31 AM

Awesome idea!

by cmuguythrow

1/31/2026 at 7:08:12 AM

Chinese here, some of the tune is wrong, maybe the env here has some noise, good luck on learning mandarin ;)

by wenjian

2/1/2026 at 12:59:17 PM

Nice now just add Thai support ;)

by kanwisher

1/31/2026 at 3:53:36 AM

holy crap, I was literally imaging how I wanted something exactly like this yesterday! you are a hero!

by iamanllm

1/31/2026 at 7:29:48 AM

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by maximgeorge

1/31/2026 at 8:01:16 PM

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by asyncadventure

2/1/2026 at 2:23:35 AM

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by Irishappy

2/1/2026 at 2:13:59 AM

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by Irishappy

1/31/2026 at 4:01:14 PM

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by asyncadventure

1/31/2026 at 3:16:09 PM

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by genie3io

1/31/2026 at 1:55:03 AM

[flagged]

by funkyfiddler369