I am a 14 year old boy and I think my voice is changing. Last year I used to nail notes from D4-G5 in my chest voice and I was always taking the high octave (even with the girls singing) but over the last month, anything above a C5 is starting to become pretty tiring for my voice. What should I do for singing practice now? My comfortable range now is more like F3-D5 in chest voice (I don't like to sing in falsetto). It used to be like A3-G5 or A5.
1.) Don’t freak out. Every boy goes through this. :)
2.) Don’t force those high notes - your vocal folds are growing so your voice is going to become less predictable - you’ll lose some high, gain some low, and crack between them occasionally.
3.) Do vocal warmups: regular vocal warmups will strengthen your voice and will ease the transition of your voice, making cracks and things less likely / noticeable.
4.) Keep singing, but be honest with yourself and what’s right for your voice. You can’t sing the highest parts anymore, and that’s okay. Start learning to sing the lower parts - your choir director really wants low voices and will be happy!
5.) Random fact: even after your voice “settles” it actually won’t reach maturity until your mid-30’s. So be kind: vocal warm-ups, never force, and lots of water = happy voice
Optional: If you can afford it, a voice teacher (specifically one who is classically-trained in vocal pedagogy) can do many wonders for your voice.