On Sun, Jun 12, 2005 at 04:30:52PM -0400, John Ackermann N8UR wrote: > Hi -- > > After successfully getting gnuradio and the USRP to run on my laptop > (Thinkpad R40), I decided it was time to install it on my main hamshack > computer. Using the lessons I learned the first time, the code built > just fine and I can talk to the USRP. > > However, I'm having trouble getting audio out of the box. The on-board > AC97 soundcard seems frozen at 48ksamples/second, and the example > programs I've tried print something like: > > audio_alsa_sink[hw:0,0]: unable to support sampling rate 32000 > card requested 48000 instead. > > and I get extremely distorted audio and lots of underruns printing to > the console. > > Any suggestions how to resolve this problem? I messed with the various > decimation params in the example tvrx_wfm program, but managed only to > prove how little I know what's going on inside the system. > > Thanks, > > John
Hi John, Some sound cards will only run at 48,000 S/sec. Try using plughw:0,0 as the pcm device (second arg to audio.source/sink). It will insert an automatic sample rate converter. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
