4453 Views 1 Reply Latest reply: Mar 15, 2008 3:16 PM by ed2345
In audio encoding, "joint stereo" takes advantage of the fact that the two stereo channels are well-correlated to each other, and uses that fact to capture the audio information more efficiently. "Normal stereo" treats the two tracks independently.
If it is done right, joint stereo does offer an advantage in fidelity at a given bit rate, but there is a lot of folklore about whether various implementations really do it right. I can't say for sure what goes on in the Apple implementation, but unless you are noticing a perceptible difference, my inclination would be to go with the defaults.