Re: [Discuss-gnuradio] Wav sink problem

[Anton Komarov]

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)
<address@hidden> 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
>
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