sndfile-convert converts sound files from one audio format to another. The output file is overwritten it it already exists.

Formats The format of the output file is determined by the filename extension. The following file formats are currently recognized:

wav WAV (Microsoft) aif AIFF (Apple/SGI) au AU (Sun/NeXT) snd AU (Sun/NeXT) raw RAW (header-less) gsm RAW (header-less) vox RAW (header-less) paf PAF (Ensoniq PARIS, big-endian) fap PAF (Ensoniq PARIS, little-endian) svx IFF (Amiga IFF/SVX8/SV16) nist SPHERE (NIST SPeech HEader Resources) sph SPHERE (NIST SPeech HEader Resources) voc VOC (Creative Labs) ircam SF (Berkeley/IRCAM/CARL) sf SF (Berkeley/IRCAM/CARL) w64 W64 (SoundFoundry WAVE 64) mat MAT4 (GNU Octave 2.0 / Matlab 4.2) mat4 MAT4 (GNU Octave 2.0 / Matlab 4.2) mat5 MAT5 (GNU Octave 2.1 / Matlab 5.0) pvf PVF (Portable Voice Format) xi XI (FastTracker 2) htk HTK (HMM Tool Kit) sds SDS (Midi Sample Dump Standard) avr AVR (Audio Visual Research) wavex WAVEX (MS WAVE with WAVEFORMATEX) sd2 SD2 (Sound Designer II) flac FLAC (FLAC Lossless Audio Codec) caf CAF (Apple Core Audio File) wve WVE (Psion Series 3) prc WVE (Psion Series 3) ogg OGG (OGG Container format) oga OGG (OGG Container format) mpc MPC (Akai MPC 2k) rf64 RF64 (RIFF 64)

Options The following options are recoginzed:

-override-sample-rate=rate Make the input use sample rate of rate Hz. -endian=little Make the output file use little endian data. -endian=big Make the output file use big endian data. -endian=cpu Make the output file use CPU endianness. -normalize Normalize the audio data in the output file.

Encodings The optional encoding parameter allows setting of the data encoding for the output file. The following encodings are currently supported:

-pcms8 signed 8 bit pcm -pcmu8 unsigned 8 bit pcm -pcm16 16 bit pcm -pcm24 24 bit pcm -pcm32 32 bit pcm -float32 32 bit floating point -ulaw ULAW -alaw ALAW -ima-adpcm IMA ADPCM (WAV only) -ms-adpcm MS ADPCM (WAV only) -gsm610 GSM6.10 (WAV only) -dwvw12 12 bit DWVW (AIFF only) -dwvw16 16 bit DWVW (AIFF only) -dwvw24 24 bit DWVW (AIFF only) -vorbis Vorbis (OGG only)

If no encoding is specified for the output file, sndfile-convert will try to use the encoding of the input file. This will not always work as most container formats (e.g. WAV, AIFF etc) only support a small subset of encodings (e.g. 16 bit PCM, a-law, Vorbis etc).