I've got a new 8-Core Mac Pro and I've noticed that I'm not
getting a clean stereo out of the 'Audio Out' mini-jack.
Neither out of the headphone socket - and it's kind of clean when I test using
a USB audio out.
I've tried flashing the P-RAM and V-Ram, I've tried deleting the audio.plist and I've also done another
clean install of the OS from the installer disk.
What's curious is that I had the exact same problem with my Macbook Pro,
I've tested the speakers on another audio source, and they are playing stereo fine, which leads me to believe it's something to do with the new Mac Pro.
8-Core 3.0 Intel Mac Pro, Dual 2 gig G5, AJA Kona SD, AJA Kona 2, Huge Systems Array UL3D, AJA Io HD, 17" MBP, Matrox MXO2 with MAX - Cinema Displays I have a 22" that I paid 4k for still working. G4 with Kona SD card, and SCSI card.