Rechercher une page de manuel

Chercher une autre page de manuel:

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.

Comme toute science, la mathématique ne peut être construite sur la
seule logique.
-+- David Hilbert, Les fondements des mathématiques -+-