Originally Posted by amt
I noticed a distinct and repeatable audio problem with SACD today. I am using the bdp-83 with hdmi and SACD output via LPCM. In stereo mode, it's totally fine. However, in multi-channel mode, I have a distinct audio error in the right surround channel. It's sort of a "blip" twice every second. It's as if one of the other channels is mixed in with the right surround for just a fraction of a second. This happens throughout all tracks, and is more obvious the louder the overall track is. I have tried multiple SACDs and so far every one does this. I also checked a couple blu-rays, also output via LPCM, and none of them do this (and this should rule out my preamp as a culprit). I am thinking something is wrong with SACD in particular. Has anyone observed this? Could someone try a multi-channel SACD and pay close attention to the right surround and let me know if you hear anything odd? Thanks....
No such problem here. Are you running the latest firmware in your 83?
Tested with the 5.1 layer from "Stay in Tune with PentaTone", SACD. HDMI LPCM output to my Anthem Statement D2v. 5.1 speaker configuration.
I checked both louder and softer volume tracks.
I also checked test tracks 43-48 which send noise bursts out to the 5.1 channels one at a time. There is no cross channel bleed, and there is nothing unusual in the Right Surround itself.
I put my ear right up to the Right Surround to make sure I'd hear anything like this despite the audio coming from the other speakers. I also compared against Left Surround -- no difference.
The most likely explanation is that your AVR is having trouble with 88.2KHz 5.1 LPCM input (which is what the 83 sends out for SACD 5.1 PCM on HDMI). 88.2KHz is not a rate you are likely to find on any Blu-ray tracks, which is probably why you have not heard this when checking LPCM from Blu-rays.
ETA: I just noticed your additional comment about also having a separate video processor in the HDMI path. Yes, you should test with that removed. HDMI audio is embedded inside the HDMI video signal -- not a separate signal -- so it is certainly POSSIBLE for a video processor to screw it up.
And yes, testing using the 5.1 Analog outputs will be very useful. If the problem happens with Analog output then it is much more likely to be a problem in your player. If it does NOT happen with Analog output, then that's pretty strong evidence the problem is in your sound processor.
--BobEdited by Bob Pariseau - 11/28/12 at 7:56am