i don't know... your description of the project is about as specific as a white cat in a snowstorm.
"i'm sorry detective, my responses are limited. you must first ask the right question...."
for instance, are you trying to control an audio signal, or is the audio signal controlling something? we could build a longer "decision tree" from there, but i also don't like playing "20 questions".
and i'm sure if you google "audio control project" your first five responses will be "buy AUDIO CONTROL PROJECT for less with free shipping"