On 2020/02/11 10:35 +0100, Jaroslav Kysela wrote:
Dne 11. 02. 20 v 9:16 Benjamin Poirier napsal(a):
[...]
Why PA handles the rear volume control with the current driver code in the legacy ALSA driver? It should be handled like standard stereo device. I'll check.
The device comes up with "Analog Stereo Output" profile by default. I changed it to "Analog Surround 4.0 Output" to test controlling each channel individually:
Yes, but does the volume control work (does PA change the appropriate ALSA mixer volume)? Sometimes, it's difficult to see the difference between soft volume attenuation and the hardware volume control.
I see what you mean. When set to the "Analog Surround 4.0 Output", pulseaudio didn't change the "Bass Speaker" mixer (always at 0dB gain). It used a combination of Master, Front and sometimes PCM mixers to control all four speakers.
For example: pacmd list-sinks name: <alsa_output.pci-0000_00_1f.3.analog-surround-40> volume: front-left: 10349 / 16% / -48.09 dB, front-right: 39377 / 60% / -13.27 dB, rear-left: 23979 / 37% / -26.20 dB, rear-right: 47974 / 73% / -8.13 dB balance 0.61 alsactl -f /tmp/output store 0 iface MIXER name 'Front Playback Volume' value.0 33 value.1 79 range '0 - 87'
name 'Bass Speaker Playback Volume' value.0 87 value.1 87 range '0 - 87'
name 'Master Playback Volume' value 77 range '0 - 87'
name 'PCM Playback Volume' value.0 255 value.1 255 range '0 - 255'
You should also test PA with UCM.
Please let me know what do I need to test exactly? I'm not familiar with UCM.
Just install the latest pulseaudio (latest from repo), alsa-lib and alsa-ucm-conf (also from repo). If pulseaudio detects UCM, it has the preference.
Using the packages in debian unstable, `pacmd list` shows "use_ucm=yes". alsa-ucm-conf was already installed. Hopefully that's enough.
ii alsa-ucm-conf 1.2.1.2-2 all ALSA Use Case Manager configuration files ii libasound2:amd64 1.2.1.2-2 amd64 shared library for ALSA applications ii pulseaudio 13.0-5 amd64 PulseAudio sound server
pacmd list name: <module-alsa-card> argument: <device_id="0" name="pci-0000_00_1f.3" card_name="alsa_card.pci-0000_00_1f.3" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes avoid_resampling=no card_properties="module-udev-detect.discovered=1">