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.
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
app = stdgui2.stdapp (my_top_block, “USRP NBFM RX”)
File “/usr/lib/python2.6/dist-packages/gnuradio/wxgui/stdgui2.py”, line
wx.App.init (self,* redirect=False*)
return _audio_alsa.sink(*args, **kwargs)
I found that someone met the similar problems as I have. And the answer
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
I tried to restart the system and re-run the program but the error is
there. So I guess the sound card may not be used by some other
but something else such as configuration of sound card…?
BTW, I also run this program on another computer, and it can get
But I still have no idea why I still have the error above in my first
Can any one help me with this question? Thanks in advance!