to make it even more complicated:
nogginj, I'm sorry to say that you're wrong about the left/right output.
It all depends on the output setting and/or how many samples you play (polyphony)
Each sample (in other words: each keygroup) can be set to ONE output channel (output 1-8, LEFT, RIGHT, ALL)
output 1-8 are monophon so only 1 sample at a time can be played out of these.
the outputs LEFT and RIGHT are polyphon so you can, for example play a chord on them (4times polyphon, more later..). And thats the only difference to the 1-8 outputs.
the output channel ALL represents ALL channels and is of course polyphon.
Some examples:
You set your sample to ALL and play 1 note -> these outputs will play the sample: MIX, output 1, left
Same again but you play 2 notes(at the same time) -> MIX, output 1 will play 1 note, output 2 will play the second note, left will play both notes
guess what happen when you play 3 notes

.....right, MIX and LEFT will play all three notes and the monophon outputs will devide the notes between themselfs.
The output RIGHT wont play unless you play more than 4 notes OR set a sample directly to it. You see, the left and right output devide the polyphony the first 4 samples (or rather said "poly-channels"

) will play on the LEFT output the next 4 will play on the RIGHT.
confused??
peace