NAME
rubberband — an audio time-stretching and pitch-shifting utility
program
SYNOPSIS
rubberband [options] [input file] [output file]
DESCRIPTION
This manual page documents briefly the rubberband command.
Rubber Band is a program that permits you to change the tempo and pitch
of an audio recording independently of one another.
OPTIONS
These programs follow the usual GNU command line syntax, with long
options starting with two dashes (‘-’). A summary of options is
included below.
You must specify at least one of the following time and pitch ratio
options.
-t, --time X
Stretch to X times original duration, or
-T, --tempo X
Change tempo by multiple X (equivalent to --time 1/X)
-p, --pitch X
Raise pitch by X semitones, or
-f, --frequency X
Change frequency by multiple X
The following option provides a simple way to adjust the sound. See
below for more details.
-n, --crisp N
Crispness (N = 0,1,2,3,4,5); default 4 (see below)
The remaining options fine-tune the processing mode and stretch
algorithm. These are mostly included for test purposes; the default
settings and standard crispness parameter are intended to provide the
best sounding set of options for most situations.
-P, --precise
Aim for minimal time distortion (implied by -R)
-R, --realtime
Select realtime mode (implies -P --no-threads)
--no-threads
No extra threads regardless of CPU and channel count
--threads Assume multi-CPU even if only one CPU is identified
--no-transients
Disable phase resynchronisation at transients
--bl-transients
Band-limit phase resync to extreme frequencies
--no-peaklock
Disable phase locking to peak frequencies
--no-softening
Disable large-ratio softening of phase locking
--window-long
Use longer processing window (actual size may vary)
--window-short
Use shorter processing window
--thresh N F
Set internal freq threshold N (N = 0,1,2) to F Hz
-d, --debug N
Select debug level (N = 0,1,2,3); default 0, full 3 (N.B.
debug level 3 includes audible ticks in output)
-q, --quiet
Suppress progress output
-h, --help
Show a list of available options
"Crispness" levels:
0 equivalent to --no-transients --no-peaklock --window-long
1 equivalent to --no-transients --no-peaklock
2 equivalent to --no-transients
3 equivalent to --bl-transients
4 default processing options
5 equivalent to --no-peaklock --window-short (may be suitable
for drums)
AUTHOR
Rubber Band was written by Chris Cannam <cannam@all-day-breakfast.com>.
This manual page was written by Székelyi Szabolcs <cc@mail.3d.hu> for
the Debian system (but may be used by others), because the original
program does not have a manual page. Permission is granted to copy,
distribute and/or modify this document under the terms of the GNU
General Public License, Version 2 any later version published by the
Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License
can be found in /usr/share/common-licenses/GPL.