lsconv(1) [debian man page]

LSCONV(1)						      General Commands Manual							 LSCONV(1)

NAME

       lsconv - a program does Log Sweep convolution.

SYNOPSIS

       lsconv [parameters] sweepfile inversefile

       Usage: lsconv sweepfile inversefile outfile [refsweep mingain [dlstart]]

       Example: lsconv sweep.pcm inverse.pcm impulse.pcm refchannel.pcm 0.1 0.8

DESCRIPTION

       This  manual page documents briefly the lsconv program.	This manual page was written for the Debian distribution because the original pro-
       gram does not have a manual page.

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

       lsconv is based on the log sweep method for impulse response measurement, which is one of the most accurate, especially for  acoustic  mea-
       surements. 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.

       Files used by lsconv must be in the raw 32 bit floating point format. Use for e.g. sox program for converting if needed.

PARAMETERS

       sweepfile:   sweep file name
       inversefile: inverse sweep file name
       outfile:     output impulse response file
       refsweep:    reference channel sweep file name
       mingain:     min gain for reference channel inversion
       dlstart:     dip limiting start for reference channel inversion

       Refer to html documentation for more details.

SEE ALSO

       sox(1).

AUTHOR

       This manual page was written by Jaromir Mike <mira.mikes@seznam.cz>, for the Debian project (but may be used by others).

								  August 30, 2011							 LSCONV(1)

GLSWEEP(1)						      General Commands Manual							GLSWEEP(1)

NAME

       glsweep - a program generating log sweep and inverse filter.

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 pro-
       gram 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  mea-
       surements. 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 exam-
       ple 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.

SEE ALSO

       sox(1).

AUTHOR

       This manual page was written by Jaromir Mike <mira.mikes@seznam.cz>, for the Debian project (but may be used by others).

								  August 30, 2011							GLSWEEP(1)