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scale
Langue: en
Version: 06/05/2009 (debian - 07/07/09)
Section: 1 (Commandes utilisateur)
NAME
scale - Scale the amplitude of a sound file. .DESCRIPTION
Takes a sound file and scales it by applying a gain, either constant or variable. The scale can be specified as a multiplier, a maximum or a percentage of 0db.
SYNTAX
-
scale [OPTIONS ... ] infile
INITIALIZATION
Flags:
- • -A = Generate an AIFF outout file.
- • -W = Generate an WAV outout file.
- • -h = Generate an outout file with no header.
- • -c = Generate 8-bit signed_char sound samples.
- • -a = Generate alaw sound samples.
- • -u = Generate ulaw sound samples.
- • -s = Generate short integer sound samples.
- • -l = Generate long (32 bit) integer sound samples.
- • -f = Generate floating point samples.
- • -F arg = Specifies the gain to be applied. If arg is a floating point number that gain is applied uniformly to the input. Alternatively it could be a file name which specifies a breakpoint file for varying the gain for different periods.
- • -M fpnum = Scales the input so the maximum absolute displacement is the value given.
- • -P fpnum = Scales the input so the maximum absolute displacement is the pencentage given of 0db.
- • -R = Continually rewrite the header while writing soundfile (WAV/AIFF).
- • -H integer = Show a "heart-beat" to indicate progress, in style 1, 2 or 3.
- • -N = Alert call (usually ringing the bell) when finished.
- • -o fname = output file name (default: test.wav)
EXAMPLES
-
scale -s -W -F 0.96 -o out.wav sound.wav
This creates a new sound file with a constant gain of 0.96. It is particularly useful if the input file is in floating point format.
CREDITS
Author: John ffitch
1994
AUTHORS
Barry Vercoe
MIT Media Lab
- Author.
Dan Ellis
MIT Media Lab,
Cambridge
Massachussetts
- Author.
COPYRIGHT
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre