Project

Home

News

FAQs

Download

lisodsp @ sourceforge.net

Documentation

Online Documentation

User Documentation

Developer Documentation

Related Links

Linux Kernel

Analog Realtime Synthesizer

Enlightment Sound Daemon

Other Links

dcplaya

sc68

Jess Lysen online

linux software dsp daemon SYNOPSIS lisodspd [ options ] [ -- filter [ filter-args ... ] ] DESCRIPTION Basically lisodspd forwards data from an OSS input device to an OSS output device. OPTIONS General options -h --help Display help message and exit. -V --version Display version number and exit. -v --verbose Be verbose: print some info messages . -q --quiet Keep quiet: do not print info messages. -d --daemon Daemonize: detach process from current tree and attach it to init. -p --priority=<N> Priority: set process priority from -20 (highest priority) to 19 (lowest). See also: nice(1) Device options -b --byte --8 8 bit per sample. -w --word --16 16 bit per sample (default). -1 --mono Mono channel mode. -2 --stereo Stereo channel mode (default). -s --signed Signed sample (default). -u --unsigned Unsigned sample. -L --little-endian Force little endian byte order (LSB first). -B --big-endian Force big endian byte order (MSB first). -N --native-endian Force CPU-native endian byte order (default). -r --rate=<hz> Set sampling rate in hertz. Default is 44100. Note: Range depends on both output and input device. -T --buffer=[<N>x]<T> Set output buffering to N times T ms. If N is ommitted or <=0 T is assumed to be the total buffering time and the number of frag will be calculated so that output frag time matches as close as possible the input frag time. -D --delay=<us> Additonal delay in us (exactly 2^-20th of second). Note: Useful to notify additionnal delay introduced by filter effects. -i --input-device=<device> OSS input device path. Default is /dev/lisodsp-inp. Note: It should be the path to the lisodsp device. Anyway it should work with any other valid OSS input dsp device. -o --output-device=<device> OSS input device path. Default is /dev/lisodsp-out. filter Optionnal program to filter RAW PCM from stdin to stdout. Note: The `--' before filter program name is required to avoid any conflict between lisodspd and filter options. Warning: filter is assumed to read and write sample with the specified format. Without filter lisodspd does not fail if the final format differs from the requested one as soon as both input and output format match. If a filter is running it will fail except if only the sampling rate is inaccurate because in most case this is not a real issu for a filter. EXAMPLES Typical deamon. lisodspd -d Run lisodspd as a daemon with all default parameters. Echo filter lisodspd -r 44100 -s -w -2\\ -- /usr/bin/sox\\ -t raw -r 44100 -swc 2 -\\ -t raw -r 44100 -swc 2 -\\ echo 0.7 0.9 100 0.3 Run lisodspd with an echo effects. Actually echo should not be delayed. Pitch filter (kinda ogre voice) lisodspd --delay=52428 -r 44100 -s -w -2\\ -- /usr/bin/sox\\ -t raw -r 44100 -swc 2 -\\ -t raw -r 44100 -swc 2 -\\ pitch -600 50 Run lisodspd with a one octave pitch that does not change the duration. The delay value (52428) is calculated like this: Listen and encode MP3 lisodspd -- /bin/bash -c\\ "mkfifo fifo; lame -Srx -s 44.1 fifo lisodsp-out.mp3& tee - fifo" Run shell command that creates a fifo and encodes mp3 from fifo into lisodsp-out.mp3 and finally duplicates data from stdin to stdout and fifo. BUGS None has been reported. INFO Author: benjamin gerard << ben [at] sashipa [dot] com >> Version: 0.5.0 Date: 2004/06/29

lisodsp user documentation version 0.5.0 Generated on June 2004 by doxygen 1.3.7