[linux-audio-user] command line utility to change bit depth

[Eric Dantan Rzewnicki]

Erik de Castro Lopo wrote:
> On Mon, 15 Mar 2004 23:26:51 +0100
> derek holzer <derek at x-i.net> wrote:
>>Does anyone know a good command-line app to change bit depth of WAV 
>>files? I'd like to batch process a bunch of files. Ecasound does not 
>>have this feature to my knowledge.
> In the libsndfile source code distribution there is an example program
> called sndfile-convert:
> 
>    erikd at miles > sndfile-convert 
>    
>    Usage : sndfile-convert [encoding] <input file> <output file>
>    
>        where [encoding] may be one of the following:
>    
>            -pcms8     : force the output to signed 8 bit pcm
>            -pcmu8     : force the output to unsigned 8 bit pcm
>            -pcm16     : force the output to 16 bit pcm
>            -pcm24     : force the output to 24 bit pcm
>            -pcm32     : force the output to 32 bit pcm
>            -float32   : force the output to 32 bit floating point
>            -ulaw      : force the output ULAW
>            -alaw      : force the output ALAW
>            -ima-adpcm : force the output to IMA ADPCM (WAV only)
>            -ms-adpcm  : force the output to MS ADPCM (WAV only)
>            -gsm610    : force the GSM6.10 (WAV only)
>            -dwvw12    : force the output to 12 bit DWVW (AIFF only)
>            -dwvw16    : force the output to 16 bit DWVW (AIFF only)
>            -dwvw24    : force the output to 24 bit DWVW (AIFF only)
>    
>        The format of the output file is determined by the file extension of the
>        output file name. The following extensions are currently understood:
>    
>            aif        : AIFF (Apple/SGI)
>            wav        : WAV (Microsoft)
>            au         : AU (Sun/NeXT)
>            snd        : AU (Sun/NeXT)
>            svx        : IFF (Amiga IFF/SVX8/SV16)
>            paf        : PAF (Ensoniq PARIS)
>            fap        : PAF (Ensoniq PARIS)
>            nist       : WAV (NIST Sphere)
>            ircam      : SF (Berkeley/IRCAM/CARL)
>            sf         : SF (Berkeley/IRCAM/CARL)
>            voc        : VOC (Creative Labs)
>            w64        : W64 (SoundFoundry WAVE 64)
>            raw        : RAW (header-less)
>            mat4       : MAT4 (GNU Octave 2.0 / Matlab 4.2)
>            mat5       : MAT5 (GNU Octave 2.1 / Matlab 5.0)
>            mat        : MAT4 (GNU Octave 2.0 / Matlab 4.2)
>            pvf        : PVF (Portable Voice Format)
>            sds        : SDS (Midi Sample Dump Standard)
>            xi         : XI (FastTracker 2)
> 
> libsndfile is at :
> 
>     http://www.mega-nerd.com/libsndfile/
> 	
> Erik

And of course, ecasound can be compiled with libsndfile support giving 
it access to pretty much all the above.

-ERic Rz.