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

From Alexandre Rossi <niol@zincube.net>
Newsgroups linux.debian.user
Subject Re: speaker-test: no correct sound output on LFE and others speakers
Date 2024-05-02 09:20 +0200
Message-ID <IzyTv-aump-9@gated-at.bofh.it> (permalink)
References <IyF0Z-9SVb-5@gated-at.bofh.it> <IyUt3-a2Un-5@gated-at.bofh.it> <Izic2-ahyF-5@gated-at.bofh.it>
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Hi,

> > > The issue is that speaker-test doesn't play sound to the correct speaker. If
> > > I run:
> > > 
> > > ~$ speaker-test -Dplug:surround51 -c6 -s3 -f75
> > > 
> > > The sound comes from (Center), (Front right), (Rear left) and (Rear right)
> > > speakers instead (Front right) only.
> > 
> > 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 The link you posted it shows rather outdated fixes, it talked about Jackd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).

Alex

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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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