Hi all,
I have a question about one of the examples in GNUradio 3.2.2 under
Ubuntu9.04. I tried to run usrp_nbfm_rcv.py to test the usrp board. However,
I met the following errors:
---------------------------------------------------------------
Using RX d'board A: Flex 2400 Rx MIMO B
len(rx_chan_coeffs) = 397
>>> gr_fir_ccc: using SSE
len(audio_taps) = 423
>>> gr_fir_fff: using SSE
audio_alsa_sink[hw:0,0]: unable to support sampling rate 32000
card requested 44100 instead.
*audio_alsa_sink[hw:0,0]: set_period_time_near failed: Invalid argument*
Traceback (most recent call last):
File "usrp_nbfm_rcv.py", line 382, in <module>
app = stdgui2.stdapp (my_top_block, "USRP NBFM RX")
File "/usr/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py", line 36,
in __init__
wx.App.__init__ (self,* redirect=False*)
File.....
......
return _audio_alsa.sink(*args, **kwargs)
*RuntimeError: audio_alsa_sink*
----------------------------------------------------------------
I found that someone met the similar problems as I have. And the answer from
Johnathan is that the sound card is in use by some other application,
possibly a previous run of a GNU Radio application that didn't exit cleanly.
I tried to restart the system and re-run the program but the error is still
there. So I guess the sound card may not be used by some other application,
but something else such as configuration of sound card...?
BTW, I also run this program on another computer, and it can get through!
But I still have no idea why I still have the error above in my first run.
Can any one help me with this question? Thanks in advance!
Sincerely,
Yuan
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