I’d like to chime in as a music educator/voice teacher to just add some tips and tricks here!
Taking T in no way “ruins” your voice — that’s not what testosterone does to the body! Inside your larynx (your ‘voice box’) you have what we call the vocal folds, which are two flaps of skin that are very thin on the inside. They’re shaped kind of like a V, and when you put the folds close together and push air through, they vibrate and create sound! When you stretch them, the sound is higher, and when you loosen them, the sound is lower.
What testosterone does to the vocal folds is thicken them, which lowers the pitch of the sounds you make! When moving from thinner folds to thicker folds, there’s always going to be a period of adjustment — you have to remember, these are muscles, and new ones! They can often struggle to hold a certain pitch because your muscles are changing and functioning in a new way. This is what leads to voice cracks — your body is trying to put a pitch in head voice or chest voice when the new musculature indicates it should be elsewhere. The voice ‘cracking’ sound is literally just your voice switching rapidly between chest and head voice!
The period of time in which your vocal folds are still thickening and haven’t quite settled, you are referred to as a cambiata — essentially, an in-between voice. But that doesn’t mean you should stop singing! In fact, you should absolutely KEEP singing in order to get used to your new musculature and passagio (the places where your voice switches from chest to head and head to falsetto).
Tips for singing through your voice change as a cambiata:
1. It’ll take a while. Don’t rush it. It could be up to a couple years before your voice really settles
2. Don’t push your voice! There may be notes you could hit before that you no longer can or low notes that you’re almost able to hit but not quite — don’t force them! This is what actually does damage to the voice, because you end up grinding the vocal folds together, which can create friction and eventually callouses! If a note seems out of your reach, let it be! It’s better to not sing a note/switch octaves for that note than force it and end up damaging your voice.
3. Ranges! While you’re going through a voice change, it’s best to stick to the cambiata range of ~F3 to ~F4, and move lower/higher as it feels natural. Here’s a little video so you can actually hear what I mean!
4. Most importantly: keep singing! Your vocal muscles are like any other muscles, and they get stronger/weaker depending on how much you use them. It may feel awkward as you adjust to the changes just because you can’t actually see them, but I promise you it’s completely normal for your voice to do the things it’s doing! I mean hell — I’m a cis woman and my voice was lowered by testosterone during puberty, and I’m an opera singer now! It’s your body’s normal and natural reaction to testosterone, and it’s not going to ruin your voice.
Also just a side note while I’m here because I’m passionate about this — the human voice is not as gendered as people want it to be. I won’t rant on it here, but there as cis men who sing soprano (countertenors!) and cis women who sing tenor or lower (contralto — this is me!). Singing is absolutely not “boys are this and girls are this”, it’s a spectrum with a whole lot of overlap. If you’re a pre-T/no-T trans man? You’re a countertenor. It’s a real voice part, and is highly sought after in the world of classical singing. Just listen to this — it’s John Holiday, masculine as all hell, and he’s a countertenor.
And if you’re a trans woman? Well then you’re one of the beautiful and rare contraltos, women with deep voices who are ALSO very rare and highly sought after (not to brag or anything, but welcome to the club lol), just like the gorgeous Korneva Julia.
People really want voices to be binary, and they’re just…not. Real people who study the voice know that it’s SO much more complex and beautiful than that. Okay rant over lol