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hi res flac > foobar > gts 450 > avr - audio problem
post Apr 19 2013, 07:33
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Hello all,

First post on the forums! I am having some problems with audio output through my htpc.

I have a denon 987 (same as 2807) and my connection is:
htpc (foobar version 1.1.18 > wasapi (event or push doesn't matter)) > gts450 video card's hdmi output > denon 987 receiver (hdmi1 - pure direct) > stereo speakers

I am getting an "Unsupported stream format: 96000 Hz / 24-bit / 2 channels" error and in the control panel it looks like 96000hz is not supported by denon (please see the below ss).

However, I believe 2807 supports 24bit/96000hz input via hdmi.

The test was done with HDtracks Anti-Master quality connection (high res flac files/format): https://www.hdtracks.com/index.php?file=log...ialbum_id=13277

As mentioned here, "despite HDTracks stating that all tracks are 96/24, 4 tracks are actually 44.1 kHz - not 44 upsampled to 96, but actual 44.1 - and one is 88 kHz".

I have no problems with 44.1khz tracks but I am unable to play 96khz since in the control panel it seems like it is not supported.

ADDITIONAL INFO: I found out that AVR doesn't support 96khz FLAC file formats; however these files would be decoded into 96kHz LPCM by the foobar. And I am sure denon 987 accepts stereo LPCM via hdmi.

Now either foobar is not correctly converting flac to lpcm OR there is something wrong with the connection.

My concern is regardless of what foobar does or does not, in the control panel I should be able to see "96khz" in the supported formats section due to GTS 450, wouldn't I?

Best regards.

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post Apr 20 2013, 05:37
Post #2

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Joined: 11-April 06
Member No.: 29419

Have you tried updating the video drivers? On www.geforce.com/hardware/desktop-gpus/geforce-gts-450/features it says:
(...), and 7.1 digital surround sound will be added in a Release 260 driver.

In case the new driver won't help, maybe 400 series cards are to old for HDMI audio: If I remember correctly, with the 200 series cards, HDMI audio only came through a additional wire connected to your mainboard spdif output (so they didn't generate the stream themselves). The formats your device supports look suspiciously the same as the formats a spdif connection supports.

Are your sure the receiver gets 96khz with directsound? I think DS resamples everything to a samplerate supported by the audio device.

If you only have spdif, you're stuck on 44.1/48 Stereo, but the Windows mixer of Win7 should be transparent, so you don't need to resample in Foobar.

This post has been edited by Primius: Apr 20 2013, 05:56
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