Hoping someone has some insight into this problem.
I just moved my old Kenwood 5.1 AVR out, and put the RX-V467 in its place. The Kenwood could only handle 24-bit 96KHz PCM over SPDIF, but at least it handled it. The RX-V467 claims to support 24-bit 192KHz, and as I have a few hi-res albums in that format, I wanted to be able to stream them from a PC (M-Audio Delta 192 card) to the AVR. The files are FLAC and play fine on a laptop with a Realtek chip that supports that format. And the Kenwood could handle 24-bit 96KHz FLACs via SPDIF.
The RX-V467 doesn't even show speaker icons when I set the M-Audio card to 192,000 Hz. If I go down to 176400, the front speaker lights come on, and stay on for lower samplerates. BUT, when playing back a 24-bit 96KHz FLAC from Winamp (using either the default DirectSound output plug-in, or the Maiko WASAPI output plug-in set to Shared or Exclusive mode), I get no sound. Both output plug-ins' status shows the proper format being output, and the Kenwood could handle this. All this with the M-Audio set to the correct samplerate (96000), and Winamp allowing 24-bit playback.
I've got the M-Audio hooked up to a pass-through SPDIF switch (coax in, optical out; the switch handles this fine, per the above Kenwood example), and the switch to the AVR, so that's not the problem. I do get sound if I play a "normal" CD quality FLAC, or if I play a 24-bit 96KHz FLAC (via DirectSound), but set the M-Audio to 44100 or 48000. If I go beyond 48000, I get nothing. I confirmed this by connecting the M-Audio directly to the RX-V467 via coax. The exact same results as above: no playback above 48000.
I've also tried AV3 and AV4 inputs, but of course there's no difference in test results.
If I play a DTS DVD (or audio ripped from one, played in MPC-HC via LAV Audio), where the samplerate reads 96/48, the M-Audio automatically goes to 48000, even if I had it set to 96000, but the RX-V467's Audio Decoder info says "DTS 96/24." That's just more confusing. At least all five speakers light up on the front ;-)
Another thing I notice is that the "Audio Decoder" for AV1 (Optical IN) says "Analog." Not sure if that's relevant. If I try to play a 16/44.1 FLAC with "Stereo" I get nothing. Works with Direct and Straight, and various other enhancements. Decoder always reads Analog.
So my question is, am I misinterpreting the manual? Does the RX-V467 not support PCM over SPDIF beyond 48KHz? I've tried Direct mode, Straight, Stereo, Stereo and then Direct (doubt that matters, as Direct should override all other settings). No joy.
So, guessing I've misinterpreted the manual, can anyone recommend a decent AVR that will handle 24-bit 192KHz FLACs via SPDIF?
Thanks for reading!