I can certainly relate to all the questions I get about the boy's voice changing. My voice started to change when I was about 12. This is a typical age for most boys, but the age varies.
Some boys start younger than 12. At 12, my voice started to change a little bit. Then at 13, it was a bit different again. But my voice really changed dramatically after I got into high school.
Everyone will have their own age range of voice changes. But the fact is, your voice changes.
I've witnessed boys who have been taking singing training hit the age of 13 and have a dramatic change in their voice.
Then the boy might think that something horrible has happened to his voice, and that he's never going to be able to do what he could before. That's never true.
But I'm going to point out one thing here that's going to help with that. As a boy gets older, he starts to feel that his voice has more weight. It starts to get deeper, and you can feel that it's back there in your throat.
You can see me exaggerate this at 1:30. As you're doing that, you're forming this habit of always falling back in your throat. It can make you feel like a much older person, but we don't want it to restrict your voice!
So let's correct some of your lower notes as your voice is changing, so that the weight of your voice does not affect your placement. That's everything about singing—the placement, your positioning.
Do a descending exercise with me starting at 2:33, with a long “A” sound.
Your voice is getting deeper, and you may be tempted to fall back in your throat.
We're going to reverse that.
If you start to develop this now, it will help you immeasurably later on in your life. So as I'm coming down in pitch, I'm slightly closing my mouth.
I don't allow my voice to fall back in my throat. I literally think of lifting my voice out of my throat and placing it further up around my cheeks.
Start practicing this now, and it will serve you well.
Don't worry about your voice changing. You just have to make some adjustments, and everything will be brilliant again!