convert.1 (2010 09)

c
convert(1) convert(1)
NAME
convert - convert an audio file
SYNOPSIS
/opt/audio/bin/convert
[source_file][target_file][
-sfmt format ][-dfmt format ]
[
-ddata data_type ][-srate rate ][
-drate rate ]
[
-schannels number][-dchannels number ]
DESCRIPTION
This command converts audio files from one supported file format, data format, sampling rate, and
number of channels to another. The unconverted file is retained as a source file.
-sfmt format -dfmt format
are the file formats for the source and destination files. Each format can be one of these:
au Sun file format
snd NeXT file format
wav Microsoft RIFF Waveform file format
u MuLaw format
al ALaw
l16 linear 16-bit format
lo8 offset (unsigned) linear 8-bit format
l8 linear 8-bit format
If you omit
-sfmt, convert uses the header or filename extension in the source file. You can
omit -dfmt if you supply a filename extension for the destination file.
-ddata data_type
is the data type for the destination files. data_type can be one of these:
u MuLaw
al ALaw
l16 linear 16-bit
lo8 offset (unsigned) linear 8-bit data
l8 linear 8-bit data
If you omit
-ddata, convert uses an appropriate data type, normally the data type of the source
file.
-srate rate -drate rate
are the number of samples per second for the source and destination file. Typical sampling rates
range from 8 to 11k (for voice quality) to 44,100 (for CD quality). You can use
k to indicate
thousands. For example,
8k means 8,000 samples per second.
If you omit
-srate, convert uses a rate defined by the source file header or its filename exten-
sion. For a raw file with no extension, 8,000 is used. By playing the file, you can determine if 8,000
samples is too fast or too slow.
If you omit
-drate, convert uses a sampling rate appropriate for the destination file format; if
possible, it matches the sampling rate of the source file.
-schannels number -dchannels number
are the number of channels in the source and destination files. Use 1 for mono; 2 for stereo. If
-schannels is omitted, convert uses the information in the header; for raw data files, it uses
mono.
If
-dchannels is omitted, convert matches what was used for the source file (through the
header or -schannels option); for raw data files, it uses mono.
EXAMPLES
Convert a raw data file to a headered file.
cd /opt/audio/bin
convert beep.l16 beep.au
Convert a raw data file to a headered file when the source has no extension, was sampled at 11,025 per
second, and has stereo data.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1