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README.md
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# linuxaudio
Scripts, snippets, little helpers for audio on linux
\ No newline at end of file
scripts, snippets, little helpers etc for audio on linux
## meters
* ebur128 a stereo meter using live fft of ffmpeg
* meterbridge-inputs-all
* meterbridge-pa-sink
* meterbridge-system-inputs
## jack control scripts
These were written to get a reproducible audio setup with specific hardware, working around "user friendly" dysfunctions of the audio system, particularly PA.
Make sure to adapt the amount of input/output ports to your hardware.
These are thought of as commandline alternatives of qjackctl/cadence.
* myjackctl-LP16 start jackd for Cymatic Audio LP-16 Live Player
* myjackctl-MTK start jackd for Soundcraft MTK series
* myjackctl-umc1820 start jackd for umc1820
ebur128 0 → 100755
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#! /bin/bash
# Creates a Jack input that displays a EBU R128 meter
if [ ! -z $1 ];
then
ffmpeg -y -f jack -i "$1 ebu r128" -filter_complex '[0] ebur128=video=1:target=-16:gauge=shortterm:scale=relative [v][a]' -map '[v]' -map '[a]' -pix_fmt yuv420p -c:v rawvideo -c:a pcm_s16le -f matroska -an - | ffplay -v 0 -an -autoexit -window_title "$1 ebu r128" -
else
echo "Usage: meter <name>";
fi
meterbridge-inputs-all 0 → 100755
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#!/bin/sh
foo=$(mktemp /tmp/mtrbrdg-XXXX)
if [ -z "$foo" ] ; then
echo "kaput"
exit
fi
echo -n "meterbridge -t dpm " > $foo
jack_lsp | egrep '(capture|Sink)' | grep -v midi | while read line ; do echo -n \"$line\" ; echo -n " " ; done >> $foo
echo "" >> $foo
chmod +x $foo
echo $foo
sh $foo
rm $foo
meterbridge-pa-sink 0 → 100755
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#!/bin/sh
meterbridge -t dpm\
"PulseAudio JACK Sink:front-left"\
"PulseAudio JACK Sink:front-right"
meterbridge-system-inputs 0 → 100755
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#!/bin/sh
meterbridge -t dpm\
"system:capture_1"\
"system:capture_2"\
"system:capture_3"\
"system:capture_4"\
"system:capture_5"\
"system:capture_6"\
"system:capture_7"\
"system:capture_8"\
"system:capture_9"\
"system:capture_10"\
"system:capture_11"\
"system:capture_12"\
"system:capture_13"\
"system:capture_14"\
"system:capture_15"\
"system:capture_16"\
"system:capture_17"\
"system:capture_18"\
"system:capture_19"\
"system:capture_20"\
"system:capture_21"\
"system:capture_22"\
"system:capture_23"\
"system:capture_24"
myjackctl-LP16 0 → 100755
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#!/usr/bin/env bash
# set all sorts of parameters, start jack and deal with pulseaudio.
# there are 2 different ways to have jack and pa running:
# a) jack runs on the external and pa on the internal card
# b) using pulseaudio-module-jack, pa is bridged into jack
# for case a), it makes sense to use pavucontrol to tell pa to
# leave the external card the fuck alone. (config -> device -> OFF)
# for case b), nothing will use the internal card and you need to connect
# the pulseaudio-sink to your preferred hardware outputs.
# 20210325 wotwot and d0
CARD="LP16"
INPUTS="2"
OUTPUTS="18"
usage() {
echo "usage: `basename $0` {start|stop|status}"
}
start_stuff(){
jack_control ds alsa
jack_control dps device hw:$CARD,0
# some devices might work with values as low as 64 (2^n values only)
jack_control dps period 1024
# USB devices are recommended to be set to 3
jack_control dps nperiods 3
jack_control dps rate 44100
jack_control dps midi-driver seq
jack_control eps driver alsa
jack_control eps realtime True
jack_control eps realtime-priority 85
jack_control dps inchannels $INPUTS
jack_control dps outchannels $OUTPUTS
jack_control start
jack_control status
jack_control ep
pacmd suspend true
# scenario a)
pactl unload-module module-jack-sink
pactl unload-module module-jack-source
pacmd set-default-sink alsa_output.pci-0000_00_1b.0.analog-stereo
# scenario b)
# only enable the sources if you want feedback in the audio system
#pactl load-module module-jack-sink channels=2
#pacmd set-default-sink jack_out
## only enable this if you need pa inputs bridged and if you do, make sure
## they do not cause feedback loops !
##pactl load-module module-jack-source channels=2
##pacmd set-default-source jack_in
#jack_connect "PulseAudio JACK Sink:front-left" "system:playback_15"
#jack_connect "PulseAudio JACK Sink:front-right" "system:playback_16"
#jack_disconnect "PulseAudio JACK Sink:front-left" "system:playback_1"
#jack_disconnect "PulseAudio JACK Sink:front-right" "system:playback_2"
pacmd suspend false
}
stop_stuff(){
jack_control stop
pacmd suspend true
SINKID=$(LANG=C pactl list | grep -B 1 "Name: module-jack-sink" | grep Module | sed 's/[^0-9]//g')
SOURCEID=$(LANG=C pactl list | grep -B 1 "Name: module-jack-source" | grep Module | sed 's/[^0-9]//g')
if [ ! -z "$SINKID" ] ; then
pactl unload-module $SINKID
fi
if [ ! -z "$SOURCEID" ] ; then
pactl unload-module $SOURCEID
fi
pacmd suspend false
}
case "$1" in
start)
start_stuff
;;
stop)
stop_stuff
;;
status)
jack_control status
;;
*)
usage
;;
esac
myjackctl-MTK 0 → 100755
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− 0
View file @ 539ab992
#!/usr/bin/env bash
# set all sorts of parameters, start jack and deal with pulseaudio.
# there are 2 different ways to have jack and pa running:
# a) jack runs on the external and pa on the internal card
# b) using pulseaudio-module-jack, pa is bridged into jack
# for case a), it makes sense to use pavucontrol to tell pa to
# leave the external card the fuck alone. (config -> device -> OFF)
# for case b), nothing will use the internal card and you need to connect
# the pulseaudio-sink to your preferred hardware outputs.
# 20210325 wotwot and d0
CARD="MTK"
INPUTS="24"
OUTPUTS="22"
usage() {
echo "usage: `basename $0` {start|stop|status}"
}
start_stuff(){
jack_control ds alsa
jack_control dps device hw:$CARD,0
# some devices might work with values as low as 64 (2^n values only)
jack_control dps period 1024
# USB devices are recommended to be set to 3
jack_control dps nperiods 3
jack_control dps rate 44100
jack_control dps midi-driver seq
jack_control eps driver alsa
jack_control eps realtime True
jack_control eps realtime-priority 85
jack_control dps inchannels $INPUTS
jack_control dps outchannels $OUTPUTS
jack_control start
jack_control status
#jack_control ep
pacmd suspend true
# scenario a)
pactl unload-module module-jack-sink
pactl unload-module module-jack-source
pacmd set-default-sink alsa_output.pci-0000_00_1b.0.analog-stereo
# scenario b)
# only enable the sources if you want feedback in the audio system
#pactl load-module module-jack-sink channels=2
#pacmd set-default-sink jack_out
## only enable this if you need pa inputs bridged and if you do, make sure
## they do not cause feedback loops !
##pactl load-module module-jack-source channels=2
##pacmd set-default-source jack_in
#jack_connect "PulseAudio JACK Sink:front-left" "system:playback_15"
#jack_connect "PulseAudio JACK Sink:front-right" "system:playback_16"
#jack_disconnect "PulseAudio JACK Sink:front-left" "system:playback_1"
#jack_disconnect "PulseAudio JACK Sink:front-right" "system:playback_2"
pacmd suspend false
}
stop_stuff(){
jack_control stop
pacmd suspend true
SINKID=$(LANG=C pactl list | grep -B 1 "Name: module-jack-sink" | grep Module | sed 's/[^0-9]//g')
SOURCEID=$(LANG=C pactl list | grep -B 1 "Name: module-jack-source" | grep Module | sed 's/[^0-9]//g')
if [ ! -z "$SINKID" ] ; then
pactl unload-module $SINKID
fi
if [ ! -z "$SOURCEID" ] ; then
pactl unload-module $SOURCEID
fi
pacmd suspend false
}
case "$1" in
start)
start_stuff
;;
stop)
stop_stuff
;;
status)
jack_control status
;;
*)
usage
;;
esac
myjackctl-umc1820 0 → 100755
+ 89
− 0
View file @ 539ab992
#!/usr/bin/env bash
# set all sorts of parameters, start jack and deal with pulseaudio.
# there are 2 different ways to have jack and pa running:
# a) jack runs on the external and pa on the internal card
# b) using pulseaudio-module-jack, pa is bridged into jack
# for case a), it makes sense to use pavucontrol to tell pa to
# leave the external card the fuck alone. (config -> device -> OFF)
# for case b), nothing will use the internal card and you need to connect
# the pulseaudio-sink to your preferred hardware outputs.
# cc-by-sa 20210325 wotwot and d0
CARD="UMC1820"
INPUTS="18"
OUTPUTS="20"
usage() {
echo "usage: `basename $0` {start|stop|status}"
}
start_stuff(){
jack_control ds alsa
jack_control dps device hw:$CARD,0
# some devices might work with values as low as 64 (2^n values only)
jack_control dps period 1024
# USB devices are recommended to be set to 3
jack_control dps nperiods 3
jack_control dps rate 44100
jack_control dps midi-driver seq
jack_control eps driver alsa
jack_control eps realtime True
jack_control eps realtime-priority 85
jack_control dps inchannels $INPUTS
jack_control dps outchannels $OUTPUTS
jack_control start
jack_control status
#jack_control ep
pacmd suspend true
# scenario a)
pactl unload-module module-jack-sink
pactl unload-module module-jack-source
pacmd set-default-sink alsa_output.pci-0000_00_1b.0.analog-stereo
# scenario b)
# only enable the sources if you want feedback in the audio system
#pactl load-module module-jack-sink channels=2
#pacmd set-default-sink jack_out
## only enable this if you need pa inputs bridged and if you do, make sure
## they do not cause feedback loops !
##pactl load-module module-jack-source channels=2
##pacmd set-default-source jack_in
#jack_connect "PulseAudio JACK Sink:front-left" "system:playback_15"
#jack_connect "PulseAudio JACK Sink:front-right" "system:playback_16"
#jack_disconnect "PulseAudio JACK Sink:front-left" "system:playback_1"
#jack_disconnect "PulseAudio JACK Sink:front-right" "system:playback_2"
pacmd suspend false
}
stop_stuff(){
jack_control stop
pacmd suspend true
SINKID=$(LANG=C pactl list | grep -B 1 "Name: module-jack-sink" | grep Module | sed 's/[^0-9]//g')
SOURCEID=$(LANG=C pactl list | grep -B 1 "Name: module-jack-source" | grep Module | sed 's/[^0-9]//g')
if [ ! -z "$SINKID" ] ; then
pactl unload-module $SINKID
fi
if [ ! -z "$SOURCEID" ] ; then
pactl unload-module $SOURCEID
fi
pacmd suspend false
}
case "$1" in
start)
start_stuff
;;
stop)
stop_stuff
;;
status)
jack_control status
;;
*)
usage
;;
esac
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