Hello.... Right i have some info for you. I was soloing a track in logic. i had a sampler with a piano, compressor and some delay loaded. I was listening (soloing) to my piano loop and for some reason i could hear a very very faint snare sound in the background. This got me very puzzled for about 2 days and was thinking hmmmm can channels bleed in logic??!? Eventually I clicked and found that my preset (one that i had made) on the compressor was side chained to the snare track but the wet/dry had been put very low. Hence why i could hear it when i solo'd the track. Not a clue how this happened Soo.. if u get the same thing check your side chains. (most of u prob do and its prob just me being a 'tard) ha!