The Mac has 16 channels and I think you can get as least as
many on the PC (could depend on card) but for some reason we have
been limited to 8 channels maybe because they are stereo.
I have a project where I am mixing up to 15 simultaneous
sounds. I was doing that using Quicktime (worked great) but now I
am converting it to Shockwave I have had to switch to audio files
What I realised was that I was never using more than 8 at a
time (luckily) but they had to be in synch (unluckily) so as they
were all the right length (secs from bpm and bars) I simply chucked
them into the channel queue when it was getting mixed down to 0.