@whale-av
Thanks a lot!! It is what I want to do! 

Hi~
I want to change the size of the circle only when I was saying something through microphone, I use adc~ to input microphone value, but my problem is when I didn't say something through microphone, the circle will also get bigger and smaller, because microphone will receive value even is not talking. How can I do that just when saying can change circle size? Thank you for your help!
adc test.pd