HydrogenAudio

CD-R and Audio Hardware => Audio Hardware => Topic started by: Steve Forte Rio on 2020-08-02 09:06:47

Title: HDMI audio doesn't start playing immediately
Post by: Steve Forte Rio on 2020-08-02 09:06:47
I've set up my new receiver Denon AVR-X1660H (https://usa.denon.com/en-us/shop/receivers/avrx1600h_d) to play audio from HDMI source. The chain is as follows:

FLAC 16/44.1 stereo  from PC HDD -> foobar2000 1.5.1 @ Windows 10 -> NVIDIA GTX 1660 HDMI Output -> Denon AVR CBL/SAT HDMI Input  -> wired 2.0 Speakers

The proble is that in foobar2000 the playback starts immediately, but the speakers start to sound after ~1.5 seconds. So I lose the first 1.5 secondsofthe audio. This happens with all sounds, including system sounds, but only when nothing was played before the current playback started, so it looks like Nvidia or Windows or AVR need some time to initialize HDMI output.

Is this a common porlbem for HDMI? Or maybe I have wrong setup somehow? If it is a common problem, what could be a workaround here? I have tried Affix Silence DSP already, but it places silence at the beginning of the each track, so I can't play them gaplessly then.
Title: Re: HDMI audio doesn't start playing immediately
Post by: Rollin on 2020-08-02 10:50:38
Use foo_dsp_pregap (https://foobar.hyv.fi/?view=foo_dsp_pregap) instead of Affix Silence
Title: Re: HDMI audio doesn't start playing immediately
Post by: Rollin on 2020-08-02 19:41:06
Also SPDIF Keep Alive (https://github.com/handruin/spdif-ka) and Sound Keeper (https://veg.by/en/projects/soundkeeper/) can be helpful.
Title: Re: HDMI audio doesn't start playing immediately
Post by: Steve Forte Rio on 2020-08-02 21:02:08
SoundKeeper is detected as a troian https://www.virustotal.com/gui/file/a5be26ee36e58707a957ab539128134d9d7727d48c9c27b0ce54c8283f58447a/detection

SPDIF Keep Alive stops working after playing audio through WASAPI exclusive. The Pregap DSP causes some glitch after prepended silence :(

UPD: looks like Pregap works well in Noise mode. Thanks



Title: Re: HDMI audio doesn't start playing immediately
Post by: Rollin on 2020-08-02 21:29:20
SoundKeeper is detected as a troian https://www.virustotal.com/gui/file/a5be26ee36e58707a957ab539128134d9d7727d48c9c27b0ce54c8283f58447a/detection
False positives... Source code is available for inspection - https://bitbucket.org/veg/soundkeeper/src/default/
Title: Re: HDMI audio doesn't start playing immediately
Post by: 40th.com on 2020-08-05 10:44:35
Is this a common problem for HDMI?
 
 Yes.  The tip in the pic would expain.
Title: Re: HDMI audio doesn't start playing immediately
Post by: Peter on 2020-08-05 12:11:24
One known solution is to have some app playing digital silence all the time through the offending interface. That fixed the problem with my own nVidia/HDMI rig doing exactly what you describe.

The keep-alive apps linked above should help. Though you can just run any audio player looping silence.
Title: Re: HDMI audio doesn't start playing immediately
Post by: GeSomeone on 2020-08-05 18:23:24
Same here, I fixed it with Soundswitch 2.0 (by den Otter) after trying other solutions.
Only thing is, when you switch sample rate or number of channels, the input device will probably mute for a few seconds to adjust. This will never happen with the default output though, only with WASAPI exclusive (optional).
Title: Re: HDMI audio doesn't start playing immediately
Post by: Glenn Gundlach on 2020-08-06 02:16:24

I have that 1-2 second issue with  AC-3 audio (5.1) MPEG video but not PCM stereo either from plain audio files via HDMI or video MPEG stereo only, no AC-3 via HDMI.

Title: Re: HDMI audio doesn't start playing immediately
Post by: VEG on 2020-12-06 21:42:02
SoundKeeper is detected as a troian
I updated the binary (added standard VC++ entry point to calm down AV software) and moved source code to GitHub: https://github.com/vrubleg/soundkeeper/
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