[nikkaelle]

I'm referring to speaking, not singing. After a _lot_ of work, I can speak passably as a woman or man and switch freely between the two. Depending on context I generally choose just one for the entire conversation, as switching tends to cause whiplash in the listener (^_^).

[kQq9oHeAz6wLLS]

I'm curious as to what prompted you to pursue this ability.

[nikkaelle]

I'm trans.

The ability to switch mid-sentence is mostly just something I discovered I can do and is fun. But the ability to pass as my real gender is something that helps me feel safe. And when needed, being able to occasionally pass as my prior gender (e.g., when calling my bank until I can change my name/gender legally), it also quite useful.

[wahnfrieden]

There is a common enough need for this for some

[numpad0]

Does the f0 change? Or is it like power distribution of harmonics change? Or is it something else?

[nikkaelle]

More or less everything changes. For trans men who are on HRT the voice's lowest pitch will get lower, as it would for someone AMAB going through puberty (since a second puberty is literally what's happening on HRT). Trans women do not get any voice changes from HRT though, so they train to raise their larynx when speaking to get up into the "perceived female range."

But pitch is far from the only thing that someone gendered one way or another in western culture (and presumably elsewhere). Resonance, weight, breathing patterns, word choice, and prosody all matter too. That's way too much to go into in a post here on HN, but the easiest one to understand is resonance or "size." Female-perceived speakers have higher resonance / smaller size. This means that some of the higher harmonics are amplified more than the lower harmonics, an it's called a "small size" because the actual resonating area from the larynx to the tongue is made smaller (mostly through tongue placement). Male-perceived speakers do the opposite, creating a larger space for resonance and resulting in a lowered resonance.

I know quite a few cis people who are also going through some of this training to help with their voice acting, or even just for fun.

There are a lot of good (and unfortunately some bad) resources online for trans voice training in both directions. My personal favorite (and where I started my lessons) is Seattle Voice Labs, but Online Vocal Coach / Vox Nova is also a great resource.

[numpad0]

Thanks - that matches my little observations and clears up a few questions I had. I did notice that spectrogram views are almost the same regardless of perceived gender except that the strongest bands and their distributions change, and also that perceived pitch isn't as dynamic as actual frequency shifts of harmonics, but didn't realize that the center frequency moving up had to do with both physical and figurative size. It makes sense.

One thing I've been feeling itchy regarding this domain is that a lot of existing resources are shallow and there aren't many gamified options even though things like rhythm game feels like a perfect fit. I think not a negligible number of people, especially young and inexperienced, are struggling with aggressive or dis-satisfied sounding voices against their intent. Just a laptop app to feedback the error between their intended voice and recognized voices to let them minimize the error feel like a useful thing to me.

[nikkaelle]

I've seen some people attempt to make a voice gender recognizer through machine learning, but nothing that has actually worked well. I'm not an ML expert, but I expect they're overfitting on just a small subset of accents and specific formants. The one I played with (can't find the link) was just trying to show weight vs resonance, and it got very confused by my voice. I am never misgendered from my voice but I (intentionally) have a slightly deeper femme voice than what it had been trained on.

IMO, the best way to learn to control your voice is to learn to hear variations in size, weight, pitch, open quotient, prosody, etc. From there you can become your own coach so you're not focused on an app while having a real world conversation with someone. Would a gamified version help? Possibly.

(sorry for the delay, I have no idea if you'll see this. I wrote it last week but apparently never pressed the submit button??)