NAME
audiotool - manipulate audio data files.
SYNOPSIS
audiotool -append [-offset=pos] target audiofiles...
audiotool -build [-encoding=codec] target audiofiles...
audiotool -chart [-silence=value] [-framing=msec] audiofiles...
audiotool -info audiofile
audiotool -notation audiofile [new-string]
audiotool -play audiofiles...
audiotool -soundcard [index]
audiotool -strip [-silence=value] [-framing=msec] audiofiles...
audiotool -trim [-silence=value] [-framing=msec] [-padding=frames]
audiofiles...
audiotool -version
DESCRIPTION
Audiotool is used to copy, manipulate, and examine the contents of
audio files. These audio files may be raw headerless audio data or
audio stored in common data files such as .wav or .au files. In the
near future audiotool will also support packetized audio files such as
.mp3 and .ogg.
-append
appends the content of other audio files into an existing audio
file. The offset to save within the existing file may be
specified. If nessisary the content of the specified files will
be re-encoded in the codec of the file being appended to.
-build build a brand new audio file from scratch and then copy content
from existing audio files into it. The encoding of the new
audio file will either be based on the file extension, the audio
file that is being copied into it, or by specifying the encoding
format directly.
-chart This is used to generate an energy chart profile of the audio
file frame by frame. A * indicates solid audio content, a ^
indicates what might be a lead or trailer section of partial
content, and a . indicates relative silence. Soon a autotrim
option will be added to audiotool to remove silent frames.
-info The info command gives you basic information on the audio file,
including what format it is stored as, what codec the audio data
is encoded in, how much data is in the file, what the bit rate
used is, etc.
-notation
Notation can be used to either set or display the annotation
stored in audio files which support annotations, such as .au and
.wav files.
-play Plays the content of the audio file to the default system audio
device (soundcard). Play is supported on w32 and posix systems
that support oss audio. Future work will expand to additional
platforms.
-strip Strips out all silent frames from an audio file. Silent frames
are those which fall below a threashold and that have no peak
impulse above the threashold.
-trim Removes leading and trailing "silence" from a file. The
-padding option may be used to add additional silent frames at
the end of the file after it has been trimed, as this may be
needed for files that will later be used to join together
phrases.
BUGS
At this time audiotool does not perform and ccaudio does not support
sample rate conversion. Appending and building from files which are
encoded at different sample rates could have ammusing results.
AUTHOR
Written by David Sugar.
REPORTING BUGS
Report bugs to <dyfet@gnu.org>.
COPYRIGHT
Copyright © 2004 Open Source Telecom Corp.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.