Synchronous 4 track soundrecording is for a music band the absolute minimal. Recording 'every' instrument on it's own track is a quality boost and makes the mastermix easy. The Zoom H2 has that (hidden) possibility, because it can record the sound of the 4 build-in microphones simultaneous. The only thing we need to do is to construct 4 line input plugs and 2 two pole switches.To change the soundlevel we solder some resistors and condensers in the box. As reward for the modification you get a cheap multi track fieldrecorder in the palm of your hands. Pianist, Coleman.