I’m not sure how to do this in the Viewer (if it’s even possible there), but when the clip is in the sequence timeline, if you select it and then option-L it should should change from stereo to 2 mono tracks. There’s also the Stereo Pair selection in the Modify menu that will do the same thing.
I’m not sure why the audio would play choppy. Check to see of the sample rates of the sequence and files match. If you have a lot of audio tracks try mixing them down. Perhaps you’re stressing your processor.
John
Dual 2.5 G5 4 gigs RAM OS 10.3.8 QT6.5.2
Cinema 23 Radeon 9800
FCP4.5 DVDSP 3.0.2
Huge U-320R 1TB Raid 3 firmware ENG12.BIN
ATTO UL4D driver 3.20
AJA IO driver 1.3.1 firmware v21-26
SonicStudio HD DAW, Yamaha DM1000, Genelec Monitors