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
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