MNLN44,

The audio portion of my system is setup as follows:

Sources:
596(PCM out to 568.2)
Sonos ZP80(PCM out to 568.2)
Cable TV(PCM out to 518)

Processor:
518 (PCM out to 568.2)
568.2(MHR and analog out to speakers)

Speakers:
DSP8000(front)
M33(rear)

My video setup is as follow:

Sources:
596(SDI out to scaler)
Cable(DVI out to scaler)

Scaler:
DVDO Iscan HD+(DVI out to screen)

Screen:
Pioneer PRO-1410HD Plasma

Currently, music is served through my desktop PC from an external USB2 Western Digital 500GB hard drive (Apple lossless). I recently bought two of these drives at Best Buy for just over $200 each on sale - the second one is for backup.

I've tried the 518 with each source. Since the 596 replaced my 500, I find it doesn't improve any of the sources but the cable TV audio. My assumption is that the ZP80 and 596 jitter is low enough that the 518 doesn't improve it.

John

Main system: Cable, Apple TV, HD621, G68D, AC11, 218, DSP7200SE (L+R), DSP3200 (L+R Rear)
2nd system: Cable, Apple TV, MC200, HD621, 568.2, M3100 (L+R)