Not a very exciting post & I do have a work around, but I'm gonna bump it once because I'm curious, then I'll let it fade into oblivion.
Streaming "Apocalypse Now" from Cinema Now:
Mac to TV using HDMI, TV to Amp via optical cable is good
DVD to Amp using digital co-axle is good
DVD to TV (HDMI), TV to Amp via optical = crackling from low base sounds like the helicopters and explosions
- have used 3 different optical cables (2 12' and one short one)
- have tried 2 HDMI cables
- on DVD I have HDMI set as 'Primary Pass-Thru', Sampling Freq. at 48Hz, DRC is off
- on TV its HDMI audio on 'Auto', and Optical Output Format on Dolby Digital
If I had another TV or DVD I would try it, but as it is, I cant think of any other trouble shooting procedures...