Can an arduino/rasppi control multiple audio input volumes?

Hi all, I've been considering making an audio mixer for some time so that I can run multiple inputs through my speakers at once, each with separate volume controls. Would either an Arduino or a Raspberry pi be able to control say 3 audio inputs at once and output them all through one jack? If so, are there any shields already available or will I have to make my own?



No. All you need is a simple photometer on the inputs all feeding into a single jack. But that is just basic volume control.

Ah, the joys of autocorrection....