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No audio, well only DD and DTS!!

post #1 of 3
Thread Starter 
I am sure this is a setting on my Sony STR-DG910 amplifier, but I thought I would check. I am using Plex Player on my Mac Mini OS X 10.6.x, I am using optical digital output. All my AVI, MKV, MP4 files play great - IF it is encoded in Dolby Digital or DTS. My regular video files that are not encoded with DD or DTS will not output any audio.

My display on my amp changes to PCM 48 and I see the 2 front speaker icons in blue, but no audio. When I switch over to a video that is encoded with Dolby Digital, the display on my amp switches to Dolby Digital and all 5.1 speaker icons lite up and I hear everything perfectly. Same with files encoded with DTS, display on amp changes to DTS 3/2.1 and all the icons lite up and I hear everything perfectly.

Why the heck wont regular encoded stereo files play, now? This used to work fine until recently. I think it has to do wth someone pushing a button or two or thee on my amp. I have gone through all the menus on the amp, and everything looks to be set right - what am I missing?

Ideas? Please...it is driving me nuts!

Thanks.
Randy
post #2 of 3
Quote:
Originally Posted by randy0242 View Post

I am sure this is a setting on my Sony STR-DG910 amplifier, but I thought I would check. I am using Plex Player on my Mac Mini OS X 10.6.x, I am using optical digital output.

The ".x" may or may not explain it all.
OS X 10.6.8 broke optical audio output. See this thread.
Not fixed by Lion .
post #3 of 3
Thread Starter 
Yes, it was the damned 10.6.8 update.

I reinstalled the 10.6.7 Combo upgrade, available through Apple Support downloads and all my audio issues are gone.

docs.info.apple.com/article.html?path=Mac/10.6/en/8177.html
and
support.apple.com/kb/DL1361

I applied the upgrade and then applied all other updates, except the 10.6.8 upgrade. No more audio issues, I get stereo, DD and DTS through my optical audio from my mac mini.

Randy
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