04.12.2014 15:55, bencoxdev@gmail.com wrote:
Hi Guys, Thank you for your input it's much appreciated. I have now produced the pulse audio log as suggested and it appears that when an attempt to open the Digital Surround 5.1 device, it fails with a "No such file or directory" error. Here is a snippet of the log showing the error. ( 0.456| 0.000) D: [pulseaudio] alsa-mixer.c: Looking at profile output:iec958-ac3-surround-51 ( 0.456| 0.000) D: [pulseaudio] alsa-mixer.c: Checking for playback on Digital Surround 5.1 (IEC958/AC3) (iec958-ac3-surround-51) ( 0.456| 0.000) D: [pulseaudio] alsa-util.c: Trying a52:1 with SND_PCM_NO_AUTO_FORMAT ... ( 0.456| 0.000) I: [pulseaudio] (alsa-lib)pcm.c: Unknown PCM a52:1 ( 0.456| 0.000) I: [pulseaudio] alsa-util.c: Error opening PCM device a52:1: No such file or directory So I guess the next question is what is responsible for producing the required device?
This is not the correct device. This is a software encoder that is not installed on your computer. It will degrade audio quality by compression, eat CPU time, kill PulseAudio for exhausting the real-time budget, and is generally not needed on HDMI, because HDMI can transport PCM 5.1 streams just fine.
Please see my earlier reply how to force PulseAudio into opening the correct HDMI device.