Say, you have an arduino uno + audio shield, a speaker and a jog-wheel (or mouse scroll-wheel).
And you want to play some audio-file tied to the movement of the wheel, just like you move vinyl disc. For example, you scroll forward(fast enough) — the audio plays forward(fast enough), you scroll back(slowly) — audio play backwards(same slow).
How do you do it? Is it possible anyhow? i hope i`ve made it clear.