A friend of mine has a duo, which plays to a pre-recorded drum track. The "stick count" that precedes each song is audible to the audience through the PA, and he would prefer it was not. It's part of the recording, so he can't cut it. Does a circuit exist (that might be simply a resistor in each line) that he could plug the mp3 player into which could be footswitched, to reduce the level the channel input sees? He could stomp, reduce the "front of house" volume, listen to the count, and stomp again to have the full volume restored. Does that make sense? Thanks all...