[LAU] Strange sound file

[M.H. ten Berge]

Dan S wrote:
> Hi -
> 
> If you look at the two outputs below you'll see that newmessage.wav
> has some extra info embedded in it - possibly newmessage.wav is
> actually a BWF-format file?
> http://en.wikipedia.org/wiki/Broadcast_Wave_Format
> 
> Dan
> 
> 
> sndfile-info *.wav
> Version : libsndfile-1.0.19
> ========================================
> File : newmessage.wav
> Length : 23994
> RIFF : 23986
> WAVE
> fmt  : 16
>   Format        : 0x1 => WAVE_FORMAT_PCM
>   Channels      : 2
>   Sample Rate   : 44100
>   Block Align   : 4
>   Bit Width     : 16
>   Bytes/sec     : 176400
> data : 23868
> LIST : 74
>   INFO
>     ISFT : Sonic Foundry Sound Forge 6.0
>     IENG :
>     ICRD : 2005-05-16
> End
> 
> ----------------------------------------
> Sample Rate : 44100
> Frames      : 5967
> Channels    : 2
> Format      : 0x00010002
> Sections    : 1
> Seekable    : TRUE
> Duration    : 00:00:00.135
> Signal Max  : 32768 (0.00 dB)
> 
> ========================================
> File : voicemail.wav
> Length : 57536
> RIFF : 57528
> WAVE
> fmt  : 16
>   Format        : 0x1 => WAVE_FORMAT_PCM
>   Channels      : 1
>   Sample Rate   : 44100
>   Block Align   : 2
>   Bit Width     : 16
>   Bytes/sec     : 88200
> data : 57492
> End
> 
> ----------------------------------------
> Sample Rate : 44100
> Frames      : 28746
> Channels    : 1
> Format      : 0x00010002
> Sections    : 1
> Seekable    : TRUE
> Duration    : 00:00:00.652
> Signal Max  : 32768 (0.00 dB)
> 
> ========================================
> Total Duration : 00:00:00.787
> 
> 
> 

But apart from the advanced metadata, there's a much more fundamental
difference: the first file listed above is stereo, the second is mono...

Matthijs