Martin, actually no, i am not sure. i am just pushing stop button in gnuradio companion.
from grc perspective view, what method is supposed to be used for graceful script termination? On Thu, Sep 27, 2012 at 7:07 PM, Martin Braun (CEL) <martin.br...@kit.edu> wrote: > On Thu, Sep 27, 2012 at 06:55:08PM +0400, Anton Komarov wrote: >> 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. > > Are you making sure the flow graph is terminated correctly? If you > simply kill the flow graph, the WAV block has no chance to write a > correct file header. This happens in the block destructor, or when you > call close(). > If you can't do that, you must use gr_file_sink. > > MB > >> >> 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 > > -- > 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
