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1

Can't configure 5.1 audio with 12.04

rated 0 times [ 1] [ 0] / answers: 1 / hits: 32763 / 3 Years ago, tue, november 23, 2021, 4:12:17

I have an Intel ALC892 and a Nvidia GT 520m connected to speakers via HDMI.

On lspci, I see

00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02)

    Subsystem: ZOTAC International (MCO) Ltd. Device a218

    Flags: bus master, fast devsel, latency 0, IRQ 47

    Memory at db400000 (64-bit, non-prefetchable) [size=16K]

    Capabilities: [50] Power Management version 2

    Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+

    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00

    Capabilities: [100] Virtual Channel





02:00.1 Audio device: NVIDIA Corporation HDMI Audio stub (rev a1)

    Subsystem: ZOTAC International (MCO) Ltd. Device 2180

    Flags: bus master, fast devsel, latency 0, IRQ 18

    Memory at db080000 (32-bit, non-prefetchable) [size=16K]

    Capabilities: [60] Power Management version 3

    Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+

    Capabilities: [78] Express Endpoint, MSI 00

    Kernel driver in use: snd_hda_intel

My alsamixer looks like
enter image description here

I enabled pulseaudio configuration file to have 6 channels. My sound setting looks like

enter image description here

When I use the test dialog, only front left and right have sounds. If I use alsa in XBMC on a 5.1 video, there's no sound. If I use pulseaudio, only front right and left have sound. I can barely hear any speech since I'm guessing it's mapped to front center. Any clues?

Update: on what I'm hearing on Ubuntu's IRC, I can't do 5.1 over HDMI and my best bet is to encode AC3 live over S/PDIF using A52 but I can't compile alsa-plugins... it gives an error somewhere while building oss. Any second opinions?

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nerta

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1 Year ago

answered 3 Years ago ligdesig · Accepted Answer

I ended solving this with the following:

In PulseAudio Manager (paman package), on the tab with the output devices, there's a list of compression methods like dts etc. I enabled all of them.

I connected the audio to the home theatre with S/PDIF.

In XBMC, I set the output to optical, the output device to PulseAudio and the passthrough device to PulseAudio as well

And in 5.1 movies, it magically started playing in 5.1. Only one process can play sound at once but since I only use it for XBMC, it's not so bad.