Originally Posted by postcorner
Originally Posted by rdgrimes
Your issue is best addressed in the appropriate thread for the Denon, since that's where the issue lies.
Thanks for the response! I'm not so sure that the issue lies with the Denon since no other device I have connected to it produces this problem, only the Oppo! I feel it is an issue with the Oppo. Is there anything at all that I can try?
If you are using HDMI for audio from the OPPO there's literally nothing the OPPO can be doing wrong that would produce the symptoms you are describing (noise that happens only WHILE changing the Volume setting on your AVR). The OPPO has no way of knowing when you are in the act of changing the Volume setting on the AVR. It sends the identical HDMI audio before, during, and after that Volume change in the AVR.
The most likely reason you are not hearing it from other devices is that they are not sending the same audio format to your AVR. Evidently your AVR is having trouble properly handling the audio during Volume transitions for some audio input formats. That would be an AVR problem.
Try this: Change the HDMI Audio setting in the OPPO between LPCM and Bitstream and see if you are getting the problem both ways. Note that content which is already LPCM (e.g., CDs) will still be output as LPCM even if Bitstream is set.
Also keep track of the type of tracks your are playing when the problem occurs. For example, if they are 7.1 tracks it is quite possible you've not been playing 7.1 tracks from your other Sources. Of if they are high bit rate tracks (higher than 48KHz), it may very well be the other Sources are not sending any of those. Or if the audio track is 24-bit, it is possible your other Sources are only ever sending 16-bit. If you spot a pattern, you can try to nail down precisely what input formats your AVR is having trouble with. For example, play a CD with HDCD Decoding OFF and DTS Neo:6 Mode OFF. That will be 16 bit stereo LPCM. For higher bit rate tracks, the test tracis on AIX Audio Calibration, Blu-ray, may be a good set of tests.
While playing audio that causes the problem, press Info on the OPPO to bring up its on-screen Info display. Then press Page Up or Page Down to toggle the information displayed. The bottom line of info will now show what the OPPO is sending out as OUTPUT on the HDMI outputs.
Check in the owner's thread for your AVR as others may have experienced this problem. There may even be a firmware update related to it, particularly if you can nail down the problem to audio input of a particular type.
Some AVRs also have horsepower limitations of one form or another. For example they might be on the edge of not being fast enough if you have Room Correction turned on -- particularly for higher rate audio input formats. This can show up in various ways. I wouldn't expect noise during Volume changes to be one of them, but it's worth a look if you can't find a firmware fix.