You have now opened pandoras box.

Imagine this. On a mono recorder, you can record ONE TRACK, period. And then play it back. On a normal stereo recorder you can record 2 tracks, BUT ONLY AT THE SAME TIME, in STEREO. On SOME stereo recorders you can record ONE TRACK, rewind, listen to the previously recorded track WHILE recording on the next. Then listen to both. On any multitrack, be it 4, 8, 16, 24, or even 32, one or more tracks may be recorded in any sequence you wish. They have the ability to play back any previously recorded track, usually in headphones, (called monitoring), WHILE you record any number of new tracks, in any combination thereof. You can also, BOUNCE say 2 tracks to another empty track, leaving 3 or more tracks to, again record on, but in the case of TAPE recorders, each time you bounce, you add the NOISE from the previous track. This is a very simplistic explaination, and I am sure there are many links here at HR.com. Just do a search, or simply do a search on the net, for multitrack recording, where you will receive a much thourough explanation. Newer devices, such as computers, standalone digital tape recorders, disc recorders etc, operate much in the same way.
And I will second frederics response.
fitZ
