Hi, Martin, thanks for reply. In Audacity i see only gray background and no signal.
Actually i have started with nbfm reciever and tried to save audio in wav file. That i tried to redirect it to audio sink and audio was ok. Than i tried to use very simple scheme with audio source to wav sink and realize that wav file is broken. I do not think it is good when soxi not shoing time length for the file - that means file is broken. On Thu, Sep 27, 2012 at 6:42 PM, Martin Braun (CEL) <martin.br...@kit.edu> wrote: > Hi Anton, > > I'd rather look if your audio source is producing the correct samples. > > On Thu, Sep 27, 2012 at 12:51:20AM +0400, Anton Komarov wrote: >> i construct very simple scheme Audio Source --> Wav Sink >> gr generates non-null wav file >> -rw-rw-r-- 1 anton anton 24M сент. 27 00:46 freq2.wav > > Looks good. > >> $ soxi freq2.wav >> >> Input File : 'freq2.wav' >> Channels : 1 >> Sample Rate : 44100 >> Precision : 16-bit >> Sample Encoding: 16-bit Signed Integer PCM > > Looks good, too. > >> e.g. >> soxi info on good wav file >> >> $ soxi arecord.wav >> >> Input File : 'arecord.wav' >> Channels : 1 >> Sample Rate : 8000 >> Precision : 8-bit >> Duration : 00:00:02.38 = 19000 samples ~ 178.125 CDDA sectors >> File Size : 19.0k >> Bit Rate : 64.1k >> Sample Encoding: 8-bit Unsigned Integer PCM >> >> look at Sample Encoding - it is Signed for gnuradio and Unsigned for all >> others. > > You're comparing 16- with 8-Bit. They're different. > > Check the WAV file with Audacity. You can also connect the WAV sink to a > signal source for further tests. > > M > > -- > Karlsruhe Institute of Technology (KIT) > Communications Engineering Lab (CEL) > > Dipl.-Ing. Martin Braun > Research Associate > > Kaiserstraße 12 > Building 05.01 > 76131 Karlsruhe > > Phone: +49 721 608-43790 > Fax: +49 721 608-46071 > www.cel.kit.edu > > KIT -- University of the State of Baden-Württemberg and > National Laboratory of the Helmholtz Association > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
