JACKD(1) JACKD(1) (NAME) jackd - (JACK Audio Connection Kit) (SYNOPSIS) jackd [options] -d backend [backend-parameters] jackd --help (DESCRIPTION) jackd JACK JACK MIDI (sample-accurate) (low-latency) . GNU/Linux Unix Mac OS X MS Windows . JACK . (external) . JACK (internal) jackd . JACK . : . JACK (audio jack) . JACK : JACK Audio Connection Kit. JACK : . (OPTIONS) -d, --driver backend [backend-parameters ] . : alsa coreaudio dummy firewire oss sun portaudio. . backend-parameters . -h, --help jackd . backend-parameters --help . . -a, --autoconnect modechar (self connect) . . --help . . -m, --no-mlock --realtime . -n, --name server-name jackd server-name . $JACK_DEFAULT_SERVER . (: "default") -p, --port-max n JACK . (: 256) --replace-registry JACK . JACK ( ). -R, --realtime (realtime) . . jackd . (: true) -r, --no-realtime . -P, --realtime-priority int --realtime int . --silent . -T, --temporary . -t, --timeout int (timeout) . (watchdog timeout ) . (: 500) -Z, --nozombies JACK . JACK watchdog . -C, --internal-session-file internal-session-file internal-session-file . . : l(oad) client-name lib-name client-args JACK . client-name lib-name . client-args . c(on) source-port destination-port . source-port destination- port . # . : l inprocess1 inprocess l amp1 jalv http://lv2plug.in/plugins/eg-amp c amp:out system:playback_1 -u, --unlock GTK+ QT FLTK Wine . -v, --verbose . -c, --clocksource ( h(pet) | s(ystem) ) ( HPET System). -V, --version JACK ..SS " ALSA (ALSA BACKEND OPTIONS)" -C, --capture [ name ] -D -P . . -d, --device name (name) pcm ALSA . JACK "hw:0" /etc/modules.conf . -z, --dither [rectangular,triangular,shaped,none] (dithering). none . . -D, --duplex . -P -C . (: true) -h, --help alsa . -M, --hwmeter (hardware metering) . . -H, --hwmon (hardware monitoring) . << >> . ALSA . . . ( ) RME Hammerfall ICE1712 ( M-Audio Delta Terratec ) --hwmon . . --hwmon JACK JACK --period --nperiods . -i, --inchannels int . (: ) -I, --input-latency ( ). (: 0) -n, --nperiods int . --nperiods --period --rate . . --realtime . ( ymfpci) xrun . . ALSA --period --nperiods . . JACK --nperiods . USB -n 3 . Firewire FFADO ( FreeBoB) -n 3 . -o, --outchannels int . (: ) -O, --output-latency ( ). (: 0) -P, --playback [ name ] -D -C . . -p, --period int process() JACK. . -p xrun . xrun . JACK --period --rate. (: 1024) -r, --rate int . (: 48000) -S, --shorts . (: ) -s, --softmode xrun ALSA. --realtime JACK . -X, --midi [seq|raw] ALSA MIDI . raw JACK MIDI (raw) ALSA . seq JACK MIDI <<>> (sequencer) ALSA ( MIDI ). raw JACK MIDI ALSA ..SS " COREAUDIO (COREAUDIO BACKEND PARAMETERS)" -c, --channels . (: 2) -i, --inchannels . (: 2) -o, --outchannels . (: 2) -C, --capture (capture). (: true) -P, --playback (playback). (: true) -D, --monitor (monitor) . (: false) -D, --duplex . (: true) -r, --rate . (: 44100) -p, --period (period) . (: 128) -d, --device CoreAudio. (: none) -I, --input-latency ( ). (: 0) -O, --output-latency ( ). (: 0) -l, --list-devices CoreAudio . (: false) -H, --hog . (: false) -L, --async-latency ( ). (: 100) -G, --grain (RT) ( ). (: 100) -s, --clock-drift (clock drift) . (: false) DUMMY (DUMMY BACKEND PARAMETERS) -C, --capture int . (: 2) -P, --playback int . (: 2) -r, --rate int . (: 48000) -p, --period int process() JACK. . -p xrun . xrun . JACK --period --rate. (: 1024) -w, --wait int (usec) . (: 21333).SS " NETONE (NETONE BACKEND PARAMETERS)" -i, --audio-ins int (capture). (: 2) -o, --audio-outs int (playback). (: 2) -I, --midi-ins int midi. (: 1) -O, --midi-outs int midi. (: 1) -r, --rate int . (: 48000) -p, --period int (period). (: 1024) -n, --num-periods int . (: 5) -l, --listen-port int (sync). (: 3000) -f, --factor int . (: 1) -u, --upstream-factor int (upstream). (: 0) -c, --celt int celt . (: 0) -b, --bit-depth int (0 float 8 8bit 16 16bit). (: 0) -t, --transport-sync int (slave) master . (: true) -a, --autoconf int (Autoconfig) . (: true) -R, --redundancy int N . (: 1) -e, --native-endian int (network byte order) . (: false) -J, --jitterval int jitterbuffer master. (: 0) -D, --always-deadline int deadline . (: false) OSS (OSS BACKEND PARAMETERS) -r, --rate int . (: 48000) -p, --period int process() JACK. 2 . -p xrun . xrun . JACK --period --rate. (: 1024) -n, --nperiods int . (-p) --nperiods JACK . JACK --nperiods --period --rate. (: 2) -w, --wordlength int . (: 16) -i, --inchannels int . (: 2) -o, --outchannels int . (: 2) -C, --capture device_file . (: /dev/dsp) -P, --playback device_file . (: /dev/dsp) -b, --ignorehwbuf boolean . (: false) -e, --excl boolean . (mixing) OSS . (: false) -I, --input-latency ( ). (: 0) -O, --output-latency ( ). (: 0).SS " SUN (SUN BACKEND PARAMETERS)" -r, --rate int . (: 48000) -p, --period int process() JACK. . -p xrun . (period) xrun . JACK --period --rate. (: 1024) -n, --nperiods int . (-p) --nperiods ( ) JACK . JACK --nperiods --period --rate. (: 2) -w, --wordlength int . (: 16) -i, --inchannels int . (: 2) -o, --outchannels int . (: 2) -C, --capture device_file . (: /dev/audio) -P, --playback device_file . (: /dev/audio) -b, --ignorehwbuf boolean . (: false) PORTAUDIO (PORTAUDIO BACKEND PARAMETERS) -c, --channel . (: ) -i, --channelin . (: ) -I, --input-latency ( ). (: 0) -o, --channelout . (: ) -O, --output-latency ( ). (: 0) -C, --capture . (: true) -P, --playback . (: true) -D, --duplex . (: true) -r, --rate . (: 48000) -p, --period . (: 1024) -n, --name . (: none) -z, --dither dithering. (: none) FIREWIRE (FIREWIRE BACKEND PARAMETERS) -d, --device name Firewire (name) . JACK "hw:0" . Firewire ffado-test . GUID Firewire . GUID ("ffado-test ListDevices") -dguid:0xff2584e39b078a2e JACK . Firewire ("ffado-test BusReset") . (: hw:0) -p, --period int process() JACK. . -p xrun . xrun . JACK --period --rate . (: 1024) -n, --nperiods int . . --nperiods --period --rate . (: 3) -r, --rate int . (: 48000) -C, --capture [ name ] -D -P . . -P, --playback [ name ] -D -C . . -D, --duplex . . -D -P -C . -I, --input-latency ( ). (: 0) -O, --output-latency ( ). (: 0) -v, --verbose (verbose level) libffado. (: 3) -X, --snoop (snoop) Firewire. (: false) -h, --help firewire ..SH " (EXAMPLES)" . jackd -d alsa --help jackd -d coreaudio --help jackd -d net --help jackd -d dummy --help jackd -d firewire --help jackd -d oss --help jackd -d sun --help jackd -d portaudio --help JACK (realtime) ALSA /etc/modules.conf. jackstart --realtime --driver=alsa JACK (verbose) . . . xrun . . (FAQ) JACK . jackstart -Rv -d alsa -p 128 -n 2 -r 44100 jackd (realtime) ALSA <> ~/.asoundrc . (shaped dithering) . jackd -R -d alsa -d sblive --dither=shaped jackd ALSA /etc/modules.conf. xrun ALSA . . (rectangular dithering) . jackd -d alsa -d hw:1 -p2048 -n3 --softmode -zr jackd (full-duplex) ALSA hw:0,0 hw:0,2 . jackd -d alsa -P hw:0,0 -C hw:0,2 jackd ALSA hw:0,0. jackd -d alsa -P hw:0,0 (ENVIRONMENT) JACK . JACK $HOME/.jackdrc ( ) /etc/jackdrc ( ) . -T . $JACK_START_SERVER . . $JACK_NO_START_SERVER . JACK $JACK_DRIVER_DIR . $JACK_DEFAULT_SERVER . <> . jackd ( --name ) JACK ( jack_client_open() ) . $JACK_NO_AUDIO_RESERVATION (DBus) . JACK DBus (headless) . $JACK_PROMISCUOUS_SERVER ( ) . (user id) . ( POSIX) . : . (SEE ALSO) JACK JACK. JACK . (Pull requests) . JACK. JACK JACK . . Mac OS X JACK. (ALSA). (FFADO). IRC JACK ..SH " (BUGS)" issue : (AUTHORS) : Paul Davis : Paul Davis David Olofson Kai Vehmanen Benno Sennoner Richard Guenther Linux Audio Developers. : Paul Davis Jack O'Quin Taybin Rutkin Stephane Letz Fernando Pablo Lopez-Lezcano Steve Harris Jeremy Hall Andy Wingo Kai Vehmanen Melanie Thielker Jussi Laako Tilman Linneweh Johnny Petrantoni Torben Hohn. Stefan Schwandter Jack O'Quin Alexandre Prokoudine Thomas Brand . PDF : man -t jackd | ps2pdf - > jackd.pdf 1.9.22 February 2026 JACKD(1)