[mythtv-users] Cracking audio problem over HDMI

Jean-Yves Avenard jyavenard at gmail.com
Thu Dec 17 05:16:18 UTC 2009


2009/12/17 mythtv at blandford.net <mythtv at blandford.net>:
> I tried playing with speaker-test.
> Using: speaker-test -Diec958  -c2 twav would play fine on my TV.
> But: speaker-test -Diec958  -c6 twav would result in:
> Playback device is iec958
> Stream parameters are 48000Hz, S16_LE, 6 channels
> Using 16 octaves of pink noise
> Channels count (6) not available for playbacks: Invalid argument
> Setting of hwparams failed: Invalid argument

That's normal... A 5.1 AC3 or DTS stream is embedded in a PCM 2.0 stream.

So the only thing you can output on a iec958 interface, is stereo

> Does this mean I must feed the TV stereo only?

It's likely your TV will only accept stereo anyway.
Uncheck both AC3 and DTS in the audio settings

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