Voice as synthesizers

Here is a clip of what one of my vocal synths looks like in ProTools. Just a few of the 30-ish layers that make up a song.

I start by humming a very high, pinched, thin note into a looper which records for 2 seconds and then continuously layers it to form a solid full pitch. I put those pitches into ProTools (shown here) and manually set the volume of each pitch shown in black lines. You can visually see the notes "turn on" as the cursor moves along the timeline. Each track is generally one pitch each, just like on a keyboard, otherwise things get confusing quick! Once I've set the volumes just where I want them, all of these individual tracks get bounced down to one stereo track labeled Synth and is then mixed into the song.