[LAU] software communication with acoustic instruments (was: Lives: some beginner questions)

[rosea.grammostola]

Hi,

We had a nice gig using Lives for visuals. This got me interested. How 
would it be possible to synchronize effects with the tempo of the band 
(acoustic drumkit, electric bassguitar). What are the technical 
possibilities here? I have an idea how to do it with an electronic 
drumkit, what no idea what is possible with acoustic drumkit or perhaps 
electric bassguitar.

Dirk