pvfamp

Langue: en

Autres versions - même langue

Version: 1.4 (mandriva - 01/05/08)

Section: 1 (Commandes utilisateur)

NAME

pvfamp - pvf file amplitude adjustment.

SYNOPSIS

pvfamp [options] [<pvffile in> [<pvffile out>]]

DESCRIPTION

pvfamp increases or decreases the volume of the sound signal. Input and output is in the pvf (portable voice format) format.

OPTIONS

pvfamp can be called in the pipe mode:

        cat infile.pvf | pvfamp [optons] > outfile.pvf

        pvfamp [options] infile.pvf | <program>

or with two file names:

        pvfamp [options] infile.pvf outfile.pvf

Valid options are:

-h brief help message

-A <n> amplification factor (default is 1.0)
       n < 1 decreeses amplitude
       n > 1 increeses amplitude

-a output pvf ascii format

-b output pvf binary format (default)

-8 output 8 bit samples

-16 output 16 bit samples

-32 output 32 bit samples (default)

Usually the -A option is the only option needed.

EXAMPLES

To double the volumn of a pvf file:

        pvfamp -A 2 infile.pvf outfile.pvf

To convert a pdf file to a .wav file at 3/4 volumn:

        pvfamp -A 0.75 infile.pvf | pvftowav > outfile.wav

SEE ALSO

pvfcut, pvfecho, pvffft, pvffile, pvffilter, pvfmix, pvfnoise, pvfreverse, pvfsine, and pvfspeed

AUTHOR

Mikkel L. Ellertson <mikkel@infinity-ltd.com>