[Octave-bug-tracker] [bug #58506] sound() fails with ALSA errors

[Doron Behar]

URL:
  <https://savannah.gnu.org/bugs/?58506>

                 Summary: sound() fails with ALSA errors
                 Project: GNU Octave
            Submitted by: doronbehar
            Submitted on: Sat 06 Jun 2020 06:39:38 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Segfault, Bus Error, etc.
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 5.2.0
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

This code:


    fname = 'recording.wav';
    [audio_in ,audio_freq_sampl] = audioread(fname);
    sound(audio_in)


Fails for me with the errors:


    ALSA lib pcm_dsnoop.c:641:(snd_pcm_dsnoop_open) unable to open slave
    ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave
    ALSA lib pcm.c:2713:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
    ALSA lib pcm.c:2713:(snd_pcm_open_noupdate) Unknown PCM
cards.pcm.center_lfe
    ALSA lib pcm.c:2713:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
    ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave
    Cannot connect to server socket err = No such file or directory
    Cannot connect to server request channel
    jack server is not running or cannot be started
    JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping
unlock
    JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping
unlock


Here's my `/etc/asound.conf`:


pcm_type.pulse {
  libs.native =
/nix/store/blnv3lm40lpd0pqvk53ds5v04b1gpxl4-alsa-plugins-1.2.2/lib/alsa-lib/libasound_module_pcm_pulse.so
;
  
}
pcm.!default {
  type pulse
  hint.description "Default Audio Device (via PulseAudio)"
}
ctl_type.pulse {
  libs.native =
/nix/store/blnv3lm40lpd0pqvk53ds5v04b1gpxl4-alsa-plugins-1.2.2/lib/alsa-lib/libasound_module_ctl_pulse.so
;
  
}
ctl.!default {
  type pulse
}


I use NixOS so that's why the libraries are located in these obscure
locations. Sound is working for me for every other program I test.




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