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)
Check Out this Related Man Page
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)
I'm hoping you guys (the experts) can help me.
We have a sweep directory (/opt/application/sweep) critical to our application process. The application will lay down a file in that directory, then about 15 seconds later a post process will come along and pick that file up and continue processing.... (2 Replies)
This is a small program as a tester for a basic sweep generator for bandwidth testing of AudioScope.sh.
This DEMO is only capable of 4KHz down to about 85Hz and back due to the low bit rate, but it is proof of concept for a much wider variant using a much higher bit rate.
The file generated... (4 Replies)
Hi all...
After mentioning the generation of a sinewave sweep generator in a previous thread in this forum this is the method I decided upon.
It plots a sinewave inside an 80 x 24 terminal window.
Although the original used bc (and the line is in the code but commented out) it is now... (4 Replies)