Re: [Discuss-gnuradio] RuntimeError: audio_alsa_source

[Firas A.]

Hi,

use "plughw:0,0" as the default audio sink device as explained in :

http://www.nabble.com/Audio-Sink-Help-to10675997.html#a10690757
http://www.nabble.com/GNURadio-Example-Suggestions-to2888951.html#a2920566

Firas,



Brook Lin wrote:
> 
> I am running gnuradio3.1.1 on 64-bit machine, using Fedora7
> I also tried to run: $ rpm -qa | grep alsa , and the output is below:
> alsa-utils-1.0.14-0.5.rc2.fc7
> alsa-lib-devel-1.0.14-3.fc7
> alsa-lib-1.0.14-0.4.rc3.fc7
> python-alsa-1.0.14-1.fc7
> alsa-lib-devel-1.0.14-3.fc7
> python-alsaaudio-0.2-2.fc7
> alsa-lib-1.0.14-0.4.rc3.fc7
> 
> Do you know why I have this RuntimeError? Thanks!
> 
> 
> Brook Lin wrote:
>> 
>> 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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