SYNOPSIS

glsweep [parameters] sweepfile inversefile

Usage: glsweep rate amplitude hzstart hzend duration silence leadin leadout sweepfile inversefile

Example: glsweep 44100 0.5 10 21000 45 2 0.05 0.005 sweep.pcm inverse.pcm

DESCRIPTION

This manual page documents briefly the glsweep program. This manual page was written for the Debian distribution because the original program does not have a manual page.

glsweep is program to perform accurate time aligned impulse response measurements.

glsweep is based on the log sweep method for impulse response measurement, which is one of the most accurate, especially for acoustic measurements. This method is based on a special signal, which is a logarithmic sinusoidal sweep, that need to be reproduced through the system under test, and an inverse filter, which, when convolved with the measured log sweep, gives back the impulse response of the system.

The output format is the usual raw file with 32 bit IEEE floating point samples. If you need to convert the sweep generated using the example above to a 16 bit mono WAV file you can use SoX with a command line like this one:

sox -t f32 -r 44100 -c 1 sweep.pcm -t wav -c 1 sweep.wav

PARAMETERS

rate: reference sample rate

amplitude: sweep amplitude

hzstart: sweep start frequency

hzend: sweep end frequency

duration: sweep duration in seconds

silence: leading and trailing silence duration in seconds

leadin: leading window length as a fraction of duration

leadout: trailing window length as a fraction of duration

sweepfile: sweep file name

inversefile: inverse sweep file name

Refer to html documentation for more details.

RELATED TO glsweep…

AUTHOR

This manual page was written by Jaromír Mikeš <[email protected]>, for the Debian project (but may be used by others).