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

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Subject: Re: [linux-audio-user] command line utility to change bit depth
From: Eric Dantan Rzewnicki (eric_AT_zhevny.com)
Date: Tue Mar 16 2004 - 06:15:15 EET

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.

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