[Discuss-gnuradio] gnuradio/usrp (almost) working / IIR filter design code

[Jens Elsner]

Hello,

after some hours of fighting with wxpython and other dependencies 
gnuradio/usrp works - almost. 

No audio output so far:

ice:/home/ice/gnuradio/gr-build/gnuradio-examples/python/audio# ./mono_tone.py 
-d /dev/dsp
ALSA lib pcm.c:2068:(snd_pcm_open_noupdate) Unknown PCM /dev/dsp
audio_alsa_sink[/dev/dsp]: No such file or directory
Traceback (most recent call last):
...

Hints would be greatly appreciated.

I just browsed the "suggested projects" page - is there any demand for
python IIR filter design code? I'd like to give it a shot, but what are
the applications? I was told that IIR filters are almost dead in the digital 
age because of non-linear phase.

Thanks,
Jens