Thanks Andrew! - I am actually able to play the sound fine through sound card using the audio_sink block. It was is when I try recording it to a .wav file using the wavfile_sink block that the sounds becomes distorted. I have tired using a resampler and also tried a variety of different sample rate on the wavfile_sink, but none of them sounded normal.
gr-dsd is a vocoder block and its decoding is sort of bursty. Sometimes it seems to only take 4 input packets to equal 1 output, others it is 8 or 11. Any wise, I am wondering I am getting some form of under run. I am not getting 'aUaU' on the screen. Sometimes the sound from audio sink initially sound garbled but then becomes normal, so I wonder if it is an issue of needing to buffer up. I have tried adding in a Forecast, but it didn't help. Any other tips would be great! - Luke On Aug 30, 2013, at 5:03 PM, Andrew Davis <glneolistm...@gmail.com> wrote: > I'm not sure exactly what you are doing, but some sound cards don't support > very many rates, windows always re-samples to some rate supported by the > card, in linux you get more direct access to sound hardware and so you can > send it rates it may not like, you could add a re-sampler/sound manager like > pulse to handle all this for you, worked for me with similar issues. > > Andrew > > > On Fri, Aug 30, 2013 at 10:53 AM, Luke Berndt <luk...@gmail.com> wrote: > So I clearly have a sample rate mis-match. I am trying to record the audio > from the gr-dsd block. I don't seem to have an issue doing it using GRC. > However when I try doing using C++ the audio sounds extra slow and choppy and > the playing time is much longer than I was actually recording for. I gr-dsd > block is supposed to output audio at 8khz. I have the wavfile_sink set at > 8000 for the samples per sec parameter. I use the same setting in GRC and it > works fine. I have also tried passing this through a resampler to get the > audio rate up to 44.1khz and I still have the same problem. If I use an > audio_sink set to a sample rate of 44100 instead, I am able to listen to the > audio with no problem. > > Any idea what is going on or what I can try? > > Here is a sample of the output: > https://soundcloud.com/hackrfsounds/moto-smartnet-recording > > Thanks! > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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