Originally Posted by Marauder
Nope, I used my iPhone to stream Pandora and some albums in the music app for about 90 minutes the other day, and I didn't have any issues with sound. I haven't tried it with iTunes on a PC yet, however. For what it's worth, my 646 is connected wirelessly with a very strong signal (my router is actually located in the same cabinet, I'm just out of ethernet ports on the back at the moment!)
Hmm, that's good to know. I'll do some more tinkering with this to see if I can narrow down the source of the problem.
Upon reading some more about this occurrence, it seems like it is related to the difference in using bitstream or PCM audio output--that is, whether the source (game console) or the receiver is processing/unzipping the audio. It definitely occurs with other receivers, so I'm not convinced it's something Onkyo needs to fix (or even can).
Well, prior to the 646, I had the Xbox One connected directly to my TV via HDMI and using PCM and it did not exhibit this behavior. Since the only thing that has changed is the presence of the 646, I'd say it's at least partially to blame. Although, to be fair, I was only using stereo PCM at the time, so maybe you're right.
Actually, I'm kind of surprised that you say using Dolby Digital (bitstream) eliminates the problem, because I would think it would be the reverse. Feeding PCM to the receiver, you're having the PS3 process all of the audio which would seem to avoid any delays on the receiver end. I need to do a bit more tinkering to test out what works on my setup, but I'm definitely getting the "Dolby Surround" feed on the receiver, which means it is sending bitstream. After reading this thread, it seems that PCM is the better choice for my fat PS3 since it cannot send lossless audio via bitstream with its older hardware. I'm guessing with that the receiver only registers the audio as multichannel PCM instead of "Dolby Surround" appearing on the receiver's display, but it seems like the result is the same.
Actually, you can get the "Dolby Surround" option with either a PCM or DD input signal. And you're right about avoiding delays with PCM. I have to use a -100ms delay with the Xbox One set to DD to avoid audio delays.