Re: [Discuss-gnuradio] Re: Problem with OTA capture examples

[Peter O'Doherty]

Thanks a lot. That does the job.

But now I get this message:

len(channel_coeffs) =  795
>>> gr_fir_ccc: using SSE
len(audio_coeffs) =  51
>>> 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 "./am_rcv.py", line 105, in <module>
   main (sys.argv[1:])
 File "./am_rcv.py", line 98, in main
   fg = build_graph (filename, freq_offset_khz)
 File "./am_rcv.py", line 78, in build_graph
   audio_sink = audio.sink (int (audio_rate))
 File "/usr/local/lib/python2.5/site-packages/gnuradio/audio_alsa.py", 
line 236, in sink
   return _audio_alsa.sink(*args)
RuntimeError: audio_alsa_sink

So I guess correcting the adc_rate to 88.2e6 solves the sampling rate error:

len(channel_coeffs) =  1095
>>> gr_fir_ccc: using SSE
len(audio_coeffs) =  69
>>> gr_fir_fff: using SSE
audio_alsa_sink[hw:0,0]: set_period_time_near failed: Invalid argument
Traceback (most recent call last):
 File "./am_rcv.py", line 105, in <module>
   main (sys.argv[1:])
 File "./am_rcv.py", line 98, in main
   fg = build_graph (filename, freq_offset_khz)
 File "./am_rcv.py", line 78, in build_graph
   audio_sink = audio.sink (int (audio_rate))
 File "/usr/local/lib/python2.5/site-packages/gnuradio/audio_alsa.py", 
line 236, in sink
   return _audio_alsa.sink(*args)
RuntimeError: audio_alsa_sink

But what about the audio_alsa_sink error?

Thanks again,
Peter

> On Wed, Dec 17, 2008 at 03:47:57PM +0100, Peter O'Doherty wrote:
>   
> > The same thing happens when I simply copy a file in the  
> > ~/gnuradio-examples/python/audio directory, give it a new name and try  
> > to run it.
> >
> >     
> > > Hi,
> > > I'm working through the examples on this site:
> > >
> > > http://www.kd7lmo.net/ground_gnuradio_ota.html
> > >
> > > and am trying to run this code:
> > >
> > > http://www.kd7lmo.net/gnuradio/am_rcv.py
> > >
> > > If I run this in the terminal:
> > > ./am_rcv.py hf_10000khz_256_complex.dat 0
> > > I get this:
> > > bash: ./am_rcv.py: Permission denied
> > >
> > > Anyone have any idea what I'm doing wrong?
> > >
> > > Thanks,
> > > Peter
> > >       
>
> You need to ensure that the script is executable.
>
>  $ chmod +x am_rcv.py
>
> Eric
>
>