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Re: speaker-test: no correct sound output on LFE and others speakers

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On 02/05/24 at 09:10, Alexandre Rossi wrote:
>>> What's bothering me is that you get sound from multiple speakers while
>>> instructing out on only one.
>>>
>>> The usual issues of these setups with surround analog out are:
>>> - channel mapping issues (driver/hardware mismatch)
>>> - software downmixing to stereo
>>>
>>> There are other usual issues with surrount digital out but this is not
>>> your setup.
>>>
>>> You can have a look at [1] for software fixes on this.
>>>
>>> [1]https://alsa.opensrc.org/SurroundSound
>> The link you posted it shows rather outdated fixes, it talked about Jackd
>> daemon and surround, but I have pulseaudio daemon, maybe I've pulseaudio
>> daemon misconfiguration
> My understanding is that pulseaudio uses alsa for kernel interface and
> that speaker-test uses alsa directly. So if one cannot get speaker-test
> to sound right, it cannot work with pulseaudio. That why I suggest workarounds
> in alsa conf (asoundrc).

I tried several configurations of ~/.asoundrc in these days but nothing 
works with "speaker-test". Well some configurations let "aplay" to use 
rear-left, rear-right, front-center speakers but "speaker-test" never 
sends sound to front-center, rear-left, rear-right and LFE with this 
command:

~$ LC_ALL=C speaker-test -c 6 -D surround51 -t wav

speaker-test 1.2.8

Playback device is surround51
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 64 to 349504
Period size range from 32 to 174752
Using max buffer size 349504
Periods = 4
was set period_size = 174752
was set buffer_size = 349504
  0 - Front Left
  4 - Front Center
  1 - Front Right
  3 - Rear Right
  2 - Rear Left
  5 - LFE
Time per period = 21.908826
  0 - Front Left
^C 4 - Front Center
Transfer failed: Bad address

In place of "surround51" I've set the pcm.XXXXX  specified in 
~/.asoundrc trying so several configurations.
Just now, checking the ALSA configuration in /etc/alsa/conf.d/ I found 
the 99-pulse.conf file:

~# cat /etc/alsa/conf.d/99-pulse.conf
# PulseAudio alsa plugin configuration file to set the pulseaudio plugin as
# default output for applications using alsa when pulseaudio is running.
hook_func.pulse_load_if_running {
         lib "libasound_module_conf_pulse.so"
         func "conf_pulse_hook_load_if_running"
}

@hooks [
         {
                 func pulse_load_if_running
                 files [
                         "/usr/share/alsa/pulse-alsa.conf"
                 ]
                 errors false
         }
]

Does Debian use Pulseaudio daemon as default output for ALSA 
applications? Could it be a Pulseaudio misconfiguration? Should I try to 
uninstall it or how can I stop Pulseaudio? If I do "killall pulseaudio" 
it re-spawns immediately and "systemctl" doesn't work:

~# systemctl stop pulseaudio
Failed to stop pulseaudio.service: Unit pulseaudio.service not loaded.

Any help it's very appreciated, thanks in advance.
-- 
Franco Martelli

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Thread

speaker-test: no correct sound output on LFE and others speakers Franco Martelli <martellif67@gmail.com> - 2024-04-29 21:40 +0200
  Re: speaker-test: no correct sound output on LFE and others speakers Alexandre Rossi <niol@zincube.net> - 2024-04-30 14:10 +0200
    Re: speaker-test: no correct sound output on LFE and others speakers Franco Martelli <martellif67@gmail.com> - 2024-05-01 15:30 +0200
      Re: speaker-test: no correct sound output on LFE and others speakers Alexandre Rossi <niol@zincube.net> - 2024-05-02 09:20 +0200
        Re: speaker-test: no correct sound output on LFE and others speakers Franco Martelli <martellif67@gmail.com> - 2024-05-06 17:40 +0200
          Re: speaker-test: no correct sound output on LFE and others speakers Alexandre Rossi <niol@zincube.net> - 2024-05-07 12:00 +0200
    [SOLVED] Re: speaker-test: no correct sound output on LFE and others  speakers Franco Martelli <martellif67@gmail.com> - 2024-05-17 16:20 +0200

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