In audacity, what does the envelope show you?
a.
the changes in a track's amplitude over time
b.
the changes in a track's waveforms over time
c.
the number of tracks in a project
d.
the fair use rules for a sample

C.

The number of tracks in a project

Explanation:

Envelope Tool. The envelope tool is among the most useful editing tools for Audacity users. It allows you to alter the volume of individual tracks in Audacity, which is especially important when you are combining ('mixing') several tracks together.

AKA the answer is C.

i was actually wondering the same thing but i've tried and i don't think you can. i think once you set it up then that's what it stays as. sorry ; -;

answer; correction;