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[Discuss-gnuradio] Clues about getting Alsa input/output working under r


From: Marcus Leech
Subject: [Discuss-gnuradio] Clues about getting Alsa input/output working under recent Gnu Radio, with F7 with updates
Date: Sat, 24 Nov 2007 20:23:36 -0500
User-agent: Thunderbird 2.0.0.9 (X11/20071115)

Sometime in the last six months or so, alsa sound support has stopped
working in my usrp_psr_receiver.py application, with
  the very helpful:

  File "/usr/local/bin/usrp_psr_receiver.py", line 343, in __init__
    self.audio = audio.sink(second_input_rate, self.audiodev)
  File
"/usr/local/lib64/python2.5/site-packages/gnuradio/audio_alsa.py", line
236, in sink
    return _audio_alsa.sink(*args)
RuntimeError: audio_alsa_sink

This is when asking for plughw:0,0  as the audio I/O device.

This used to work.

Interestingly, when I do an aplay -l from the command line as a regular
user, it can't find any sound devices, but when
  I do an aplay -l as root, it can find:

**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

I'm near-certain that at some point, some Fedora 7 update buggered up
something in the sound configuration somewhere, but
  I'm not familiar enough with Alsa to know where.    Can anyone help?




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