[Discuss-gnuradio] RuntimeError: audio_alsa_source

[Brook Lin]

Hi All,

I just ran tx_voice and rx_voice.And I wanted to transmit a music and
receive it using Basic RX/TX. However, I got the error:
$ sudo ./tx_voice.py -f 30M -I music.pcm -T A -v
>>> gr_fir_fff: using SSE
bits per symbol = 1
Gaussian filter bt = 0.35
Using TX d'board A: Basic Tx
Tx amplitude     12000
modulation:      gmsk_mod
bitrate:         50kb/s
samples/symbol:    5
interp:          512
Tx Frequency:    30M
ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM musicpcm.pcm
audio_alsa_source[musicpcm.pcm]: No such file or directory
Traceback (most recent call last):
  File "./tx_voice.py", line 150, in <module>
    main()
  File "./tx_voice.py", line 121, in main
    tb = my_top_block(mods[options.modulation], options)
  File "./tx_voice.py", line 69, in __init__
    self.audio_rx = audio_rx(options.audio_input)
  File "./tx_voice.py", line 52, in __init__
    src = audio.source(sample_rate, audio_input_dev)
  File "/usr/lib64/python2.5/site-packages/gnuradio/audio_alsa.py", line
219, in source
    return _audio_alsa.source(*args)
RuntimeError: audio_alsa_source

Does anyone know how to solve it? I don't quite understand.

Thanks in advance!

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