pvanal(1)

NAME

pvanal - converts a soundfile into a series of short-time

Fourier transform frames

SYNOPSIS

pvanal [ -n<frmsiz> ] [ -w<windfact> | -h<hopsize> ] [ -g
-G<latch> ] [ -v| -V txtfile ] inputSoundfile outputFFTfile
csound  -U  pvanal  [  -n<frmsiz>  ]  [   -w<windfact>
-h<hopsize> ] [ -g| -G<latch> ] [ -v| -V txtfile ] inputSoundfile
outputFFTfile

DESCRIPTION

Fourier analysis for the Csound pvoc generator.

iwinsize is set internally to double the FFT size.

OPTIONS

-s<srate>

Override the sampling rate in the soundfile header.

The default if neither is specified is 10000

-c<channel>

Channel number. The default is 1.

-b<time>

Time in seconds to begin analysis. Default is 0.0.

-d<duration>

Duration in seconds. Default is the entire file.

-n<frmsiz>

STFT frame size: the number of samples in each

Fourier analysis frame. This must be a power of two in the range

16 to 16384. The default framesize is the smallest power of two

that corresponds to more than 20 milliseconds of the source (e.g.

256 points at 10 kHz sampling, giving a 25.6 ms frame).

-w<windfact>

Window overlap factor. Default is 4, meaning each

input point occurs in 4 output windows. Do not use with -h

-h<hopsize>

STFT frame offset. The converse of -w

-g

-G<latch>

-v

-V txtfile

SEE ALSO

csound(1),

Csound is documented fully by The Public Csound Manual,

available at http://www.lakewoodsound.com/csound/

Csound is also documented by The Alternative Csound

Reference Manual, available at http://kevindump

score.com/docs/csound-manual/

AUTHOR

This manual page was written by Hans Fugal <hans@fu

gal.net>, for the Debian project (but may be used by others).

15 Jul 2003

pvanal(1)