Sine waves and stuff

Hi all. I have a specific request or a general pondering really.

I know you can create a sine wave type thing with as, could you then perhaps create movie clips, letter by letter that would move along and up and down on this sine wave?

could you then, instead of setting the size and scale of the sine wave have it react to the input levels of a mic.

i’ve been hunting for something that will help for a while and have drawn a blank

any input on this would be of use