1JACKD(1)                                                              JACKD(1)
2
3
4

NAME

6       jackd - JACK Audio Connection Kit sound server
7
8
9

SYNOPSIS

11       jackd [options] -d backend [backend-parameters]
12       jackd --help
13
14
15

DESCRIPTION

17       jackd  is the JACK audio server daemon that allows JACK client programs
18       to process and route audio and MIDI data in a synchronous, sample-accu‐
19       rate and low-latency manner. Originally written for the GNU/Linux oper‐
20       ating system, it also runs on various Unix platforms, Mac OS X  and  MS
21       Windows.  JACK can connect a number of different client applications to
22       an audio device and also to each other. Most clients are external, run‐
23       ning  in their own processes as normal applications. JACK also supports
24       internal clients, which run within the jackd process using  a  loadable
25       "plugin" interface.
26
27       JACK differs from other audio servers in being designed from the ground
28       up for professional audio work. It focuses on two key  areas:  synchro‐
29       nous execution of all clients and low latency operation.
30
31       The  name JACK makes a reference to the classical way of patching audio
32       connections with physical audio jack cables.  JACK is also a  recursive
33       acronym,  that  is  an abbreviation which is part of itself. JACK Audio
34       Connection Kit.
35
36       For  the  latest  JACK  information  please  consult  the   web   site:
37       <http://www.jackaudio.org/>.
38
39
40

OPTIONS

42       -d, --driver backend [backend-parameters ]
43              Select  the  audio  interface  backend. The current list of sup‐
44              ported backends is: alsa, coreaudio, dummy,  firewire,  oss  sun
45              and  portaudio. They are not all available on all platforms. All
46              backend-parameters are optional.
47
48
49       -h, --help
50              Print a brief usage message describing the main  jackd  options.
51              These  do not include backend-parameters, which are listed using
52              the --help option for each specific backend. Examples below show
53              how to list them.
54
55
56       -a, --autoconnect modechar
57              Select  how  to handle self connect requests. They can be ignore
58              or fail, on all port or just external ones. Use the  --help  op‐
59              tion to know your system specific options. The default is to not
60              restrict self connect requests.
61
62       -m, --no-mlock
63              Do not attempt to lock memory, even if --realtime.
64
65
66       -n, --name server-name
67              Name this jackd instance server-name. If unspecified, this  name
68              comes  from the $JACK_DEFAULT_SERVER environment variable.  (de‐
69              fault: "default")
70
71
72       -p, --port-max  n
73              Set the maximum number of ports  the  JACK  server  can  manage.
74              (default: 256)
75
76
77       --replace-registry
78              Remove  the  shared  memory registry used by all JACK server in‐
79              stances before startup. This should rarely be used, and  is  in‐
80              tended  only  for  occasions when the structure of this registry
81              changes in ways  that  are  incompatible  across  JACK  versions
82              (which is rare).
83
84
85       -R, --realtime
86              Use realtime scheduling. This is needed for reliable low-latency
87              performance. On many systems, it requires jackd to run with spe‐
88              cial  scheduler  and  memory allocation privileges, which may be
89              obtained in several ways.  (default: true)
90
91
92       -r, --no-realtime
93              Do not use realtime scheduling.
94
95
96       -P, --realtime-priority int
97              When running --realtime, set the scheduler priority to int.
98
99
100       --silent
101              Silence any output during operation.
102
103
104
105       -T, --temporary
106              Exit once all clients have closed their connections.
107
108
109       -t, --timeout int
110              Set client timeout limit in milliseconds.  In realtime mode  the
111              client  timeout  must be smaller than the watchdog timeout (5000
112              msec).  (default: 500)
113
114
115       -Z, --nozombies
116              Prevent JACK from ever kicking out clients because they were too
117              slow.   This cancels the effect any specified timeout value, but
118              JACK and its clients are still subject to the supervision of the
119              watchdog thread or its equivalent.
120
121
122       -C, --internal-session-file internal-session-file
123              Load  internal  clients  and  connections from internal-session-
124              file.  Each line of this configuration file starts with  a  com‐
125              mand.  The following commands are available:
126              l(oad) client-name lib-name client-args
127              With  this command an internal JACK client will be instantiated.
128              client-name and lib-name cannot contain spaces.  The rest of the
129              line  will  be interpreted as client-args and sent to the client
130              library.
131              c(on) source-port destination-port
132              With this command a source port will be connected to a  destina‐
133              tion port.  source-port and destination-port cannot contain spa‐
134              ces.
135              Comments are allowed, they start with #.
136              An example configuration could look like the following:
137               l inprocess1 inprocess
138               l amp1 jalv http://lv2plug.in/plugins/eg-amp
139               c amp:out system:playback_1
140
141
142       -u, --unlock
143              Unlock libraries GTK+, QT, FLTK, Wine.
144
145
146       -v, --verbose
147              Give verbose output.
148
149
150       -c, --clocksource ( h(pet)  |  s(ystem) )
151              Select a specific wall clock (HPET timer, System timer).
152
153
154       -V, --version
155              Print the current JACK version number and exit.
156
157
158
159   ALSA BACKEND OPTIONS
160       -C, --capture [ name ]
161              Provide only capture ports, unless combined with -D or  -P.  Op‐
162              tionally set capture device name.
163
164
165       -d, --device name
166              The ALSA pcm device name to use. If none is specified, JACK will
167              use  "hw:0",  the  first  hardware  card  defined  in  /etc/mod‐
168              ules.conf.
169
170
171       -z, --dither [rectangular,triangular,shaped,none]
172              Set  dithering  mode.  If none or unspecified, dithering is off.
173              Only the first letter of the mode name is required.
174
175
176       -D, --duplex
177              Provide both capture and playback ports. Defaults to  on  unless
178              only one of -P or -C is specified.  (default: true)
179
180
181       -h, --help Print a brief usage message describing only the
182              alsa backend parameters.
183
184
185       -M, --hwmeter
186              Enable hardware metering for devices that support it. Otherwise,
187              use software metering.
188
189
190       -H, --hwmon
191              Enable hardware monitoring of capture ports. This  is  a  method
192              for  obtaining  "zero latency" monitoring of audio input. It re‐
193              quires support in hardware and from the underlying  ALSA  device
194              driver.
195
196              When  enabled,  requests to monitor capture ports will be satis‐
197              fied by creating a direct signal path  between  audio  interface
198              input and output connectors, with no processing by the host com‐
199              puter at all. This offers the lowest possible  latency  for  the
200              monitored signal.
201
202              Presently (March 2003), only the RME Hammerfall series and cards
203              based on the ICE1712 chipset (M-Audio  Delta  series,  Terratec,
204              and  others) support --hwmon. In the future, some consumer cards
205              may also be supported by modifying their mixer settings.
206
207              Without --hwmon, port monitoring requires  JACK  to  read  audio
208              into system memory, then copy it back out to the hardware again,
209              imposing the basic JACK system latency determined by  the  --pe‐
210              riod and --nperiods parameters.
211
212
213       -i, --inchannels int
214              Number  of  capture  channels.   (default:  maximum supported by
215              hardware)
216
217
218       -I, --input-latency
219              Extra input latency (frames).  (default: 0)
220
221
222       -n, --nperiods int
223              Number of periods of playback latency. In seconds,  this  corre‐
224              sponds  to  --nperiods times --period divided by --rate. The de‐
225              fault is 2, the minimum allowed. For most devices, there  is  no
226              need for any other value with the --realtime option. Without re‐
227              altime privileges or with boards providing unreliable interrupts
228              (like  ymfpci),  a  larger value may yield fewer xruns. This can
229              also help if the system  is  not  tuned  for  reliable  realtime
230              scheduling.
231
232              For  most ALSA devices, the hardware buffer has exactly --period
233              times --nperiods frames. Some devices demand a larger buffer. If
234              so,  JACK  will  use  the smallest possible buffer containing at
235              least --nperiods, but the playback latency does not increase.
236
237              For USB audio devices it is recommended to use  -n  3.  Firewire
238              devices  supported  by  FFADO  (formerly FreeBoB) are configured
239              with -n 3 by default.
240
241
242       -o, --outchannels int
243              Number of playback channels.   (default:  maximum  supported  by
244              hardware)
245
246
247       -O, --output-latency
248              Extra output latency (frames).  (default: 0)
249
250
251       -P, --playback [ name ]
252              Provide  only playback ports, unless combined with -D or -C. Op‐
253              tionally set playback device name.
254
255
256       -p, --period int
257              Number of frames between JACK process() calls. This  value  must
258              be  a  power of 2. If you need low latency, set -p as low as you
259              can go without seeing xruns. A larger period size yields  higher
260              latency,  but  makes xruns less likely. The JACK capture latency
261              in seconds is --period divided by --rate.  (default: 1024)
262
263
264       -r, --rate int
265              Sample rate.  (default: 48000)
266
267
268       -S, --shorts
269              Try to configure card for  16-bit  samples  first,  only  trying
270              32-bits if unsuccessful.  (default: 32-bit samples)
271
272
273       -s, --softmode
274              Ignore  xruns  reported by the ALSA driver. This makes JACK less
275              likely to disconnect unresponsive  ports  when  running  without
276              --realtime.
277
278
279       -X, --midi [seq|raw]
280              Which ALSA MIDI system to provide access to. Using raw will pro‐
281              vide a set of JACK MIDI ports that correspond to each  raw  ALSA
282              device on the machine. Using seq will provide a set of JACK MIDI
283              ports that correspond to each ALSA "sequencer" client (which in‐
284              cludes  each  hardware  MIDI  port on the machine). raw provides
285              slightly better performance but does not permit JACK MIDI commu‐
286              nication with software written to use the ALSA "sequencer" API.
287
288
289
290   COREAUDIO BACKEND PARAMETERS
291       -c, --channels
292              Maximum number of channels.  (default: 2)
293
294
295       -i, --inchannels
296              Maximum number of input channels.  (default: 2)
297
298
299       -o, --outchannels
300              Maximum number of output channels.  (default: 2)
301
302
303       -C, --capture
304              Whether or not to capture.  (default: true)
305
306
307       -P, --playback
308              Whether or not to playback.  (default: true)
309
310
311       -D, --monitor
312              Provide monitor ports for the output.  (default: false)
313
314
315       -D, --duplex
316              Capture and playback.  (default: true)
317
318
319       -r, --rate
320              Sample rate.  (default: 44100)
321
322
323       -p, --period
324              Frames per period, must be a power of 2.  (default: 128)
325
326
327       -d, --device
328              CoreAudio device name.  (default: none)
329
330
331       -I, --input-latency
332              Extra input latency (frames).  (default: 0)
333
334
335       -O, --output-latency
336              Extra output latency (frames).  (default: 0)
337
338
339       -l, --list-devices
340              Display available CoreAudio devices.  (default: false)
341
342
343       -H, --hog
344              Take exclusive access of the audio device.  (default: false)
345
346
347       -L, --async-latency
348              Extra  output latency in asynchronous mode (percent).  (default:
349              100)
350
351
352       -G, --grain
353              Computation grain in RT thread (percent).  (default: 100)
354
355
356       -s, --clock-drift
357              Whether or not to compensate clock drift in dynamically  created
358              aggregate device.  (default: false)
359
360
361
362   DUMMY BACKEND PARAMETERS
363       -C, --capture int
364              Number of capture ports.  (default: 2)
365
366
367       -P, --playback int
368              Number of playback ports.  (default: 2)
369
370
371       -r, --rate int
372              Sample rate.  (default: 48000)
373
374
375       -p, --period int
376              Number  of  frames between JACK process() calls. This value must
377              be a power of 2. If you need low latency, set -p as low  as  you
378              can  go without seeing xruns. A larger period size yields higher
379              latency, but makes xruns less likely. The JACK  capture  latency
380              in seconds is --period divided by --rate.  (default: 1024)
381
382
383       -w, --wait int
384              Number  of  usecs  to  wait between engine processes.  (default:
385              21333)
386
387
388
389   NETONE BACKEND PARAMETERS
390       -i, --audio-ins int
391              Number of capture channels.  (default: 2)
392
393
394       -o, --audio-outs int
395              Number of playback channels.  (default: 2)
396
397
398       -I, --midi-ins int
399              Number of midi capture channels.  (default: 1)
400
401
402       -O, --midi-outs int
403              Number of midi playback channels.  (default: 1)
404
405
406       -r, --rate int
407              Sample rate.  (default: 48000)
408
409
410       -p, --period int
411              Frames per period.  (default: 1024)
412
413
414       -n, --num-periods int
415              Network latency setting in no. of periods.  (default: 5)
416
417
418       -l, --listen-port int
419              The socket port we are listening on for sync packets.  (default:
420              3000)
421
422
423       -f, --factor int
424              Factor for sample rate reduction.  (default: 1)
425
426
427       -u, --upstream-factor int
428              Factor for sample rate reduction on the upstream.  (default: 0)
429
430
431       -c, --celt int
432              Sets  celt  encoding and number of kbits per channel.  (default:
433              0)
434
435
436       -b, --bit-depth int
437              Sample bit-depth (0 for float, 8 for 8bit  and  16  for  16bit).
438              (default: 0)
439
440
441       -t, --transport-sync int
442              Whether  or  not to slave the transport to the master transport.
443              (default: true)
444
445
446       -a, --autoconf int
447              Whether or not to use  Autoconfig,  or  just  start.   (default:
448              true)
449
450
451       -R, --redundancy int
452              Send packets N times.  (default: 1)
453
454
455       -e, --native-endian int
456              Don't convert samples to network byte order.  (default: false)
457
458       -J, --jitterval int
459              Attempted jitterbuffer microseconds on master.  (default: 0)
460
461
462       -D, --always-deadline int
463              Always use deadline.  (default: false)
464
465
466
467   OSS BACKEND PARAMETERS
468       -r, --rate int
469              Sample rate.  (default: 48000)
470
471
472       -p, --period int
473              Number  of  frames between JACK process() calls. This value must
474              be a power of 2. If you need low latency, set -p as low  as  you
475              can  go without seeing xruns. A larger period size yields higher
476              latency, but makes xruns less likely. The JACK  capture  latency
477              in seconds is --period divided by --rate.  (default: 1024)
478
479
480       -n, --nperiods int
481              Number  of periods in the hardware buffer.  The period size (-p)
482              times --nperiods times four is the JACK buffer  size  in  bytes.
483              The  JACK output latency in seconds is --nperiods times --period
484              divided by --rate.  (default: 2)
485
486
487       -w, --wordlength int
488              Sample size in bits.  (default: 16)
489
490
491       -i, --inchannels int
492              Number of capture channels.  (default: 2)
493
494
495       -o, --outchannels int
496              Number of playback channels.  (default: 2)
497
498
499       -C, --capture device_file
500              Input device for capture.  (default: /dev/dsp)
501
502
503       -P, --playback device_file
504              Output device for playback.  (default: /dev/dsp)
505
506
507       -b, --ignorehwbuf boolean
508              Whether or not to ignore hardware period size.  (default: false)
509
510
511       -e, --excl boolean
512              Request exclusive and direct access to the sound  device.   This
513              avoids  mixing and automatic audio conversion in the OSS driver,
514              and the extra latency that comes with that.  (default: false)
515
516
517       -I, --input-latency
518              Extra input latency (frames).  (default: 0)
519
520
521       -O, --output-latency
522              Extra output latency (frames).  (default: 0)
523
524
525
526   SUN BACKEND PARAMETERS
527       -r, --rate int
528              Sample rate.  (default: 48000)
529
530
531       -p, --period int
532              Number of frames between JACK process() calls. This  value  must
533              be  a  power of 2. If you need low latency, set -p as low as you
534              can go without seeing xruns. A larger period size yields  higher
535              latency,  but  makes xruns less likely. The JACK capture latency
536              in seconds is --period divided by --rate.  (default: 1024)
537
538
539       -n, --nperiods int
540              Number of periods in the hardware buffer.  The period size  (-p)
541              times --nperiods times four (assuming 2 channels 16-bit samples)
542              is the JACK buffer size in bytes.  The JACK  output  latency  in
543              seconds  is  --nperiods  times --period divided by --rate.  (de‐
544              fault: 2)
545
546
547       -w, --wordlength int
548              Sample size in bits.  (default: 16)
549
550
551       -i, --inchannels int
552              Number of capture channels.  (default: 2)
553
554
555       -o, --outchannels int
556              Number of playback channels.  (default: 2)
557
558
559       -C, --capture device_file
560              Input device for capture.  (default: /dev/audio)
561
562
563       -P, --playback device_file
564              Output device for playback.  (default: /dev/audio)
565
566
567       -b, --ignorehwbuf boolean
568              Whether or not to ignore hardware period size.  (default: false)
569
570
571
572   PORTAUDIO BACKEND PARAMETERS
573       -c, --channel
574              Maximum number of channels.  (default:  all  available  hardware
575              channels)
576
577
578       -i, --channelin
579              Maximum number of input channels.  (default: all available hard‐
580              ware channels)
581
582
583       -I, --input-latency
584              Extra input latency (frames).  (default: 0)
585
586
587       -o, --channelout
588              Maximum number of  output  channels.   (default:  all  available
589              hardware channels)
590
591
592       -O, --output-latency
593              Extra output latency (frames).  (default: 0)
594
595
596       -C, --capture
597              Whether or not to capture.  (default: true)
598
599
600       -P, --playback
601              Whether or not to playback.  (default: true)
602
603
604       -D, --duplex
605              Capture and playback.  (default: true)
606
607
608       -r, --rate
609              Sample rate.  (default: 48000)
610
611
612       -p, --period
613              Frames per period, must be a power of 2.  (default: 1024)
614
615
616       -n, --name
617              Driver name.  (default: none)
618
619
620       -z, --dither
621              Dithering mode.  (default: none)
622
623
624
625   FIREWIRE BACKEND PARAMETERS
626       -d, --device name
627              The Firewire device name to use. If none is specified, JACK will
628              try to use "hw:0". To get a list of available Firewire  devices,
629              see  ffado-test.  It's recommended to use the GUID of a Firewire
630              device to rule out any ambiguities. Once the GUID of the  device
631              is  known  ("ffado-test  ListDevices"),  it  can  be  used  like
632              -dguid:0xff2584e39b078a2e to tell JACK which interface  to  use.
633              Sometimes  resetting the Firewire bus can help ("ffado-test Bus‐
634              Reset") if there is any problem.  (default: hw:0)
635
636
637       -p, --period int
638              Number of frames between JACK process() calls. This  value  must
639              be  a  power of 2. If you need low latency, set -p as low as you
640              can go without seeing xruns. A larger period size yields  higher
641              latency,  but  makes xruns less likely. The JACK capture latency
642              in seconds is --period divided by --rate.  (default: 1024)
643
644
645       -n, --nperiods int
646              Number of periods of playback latency. Value must be greater  or
647              equal  2. In seconds, this corresponds to --nperiods times --pe‐
648              riod divided by --rate.  (default: 3)
649
650
651       -r, --rate int
652              Sample rate.  (default: 48000)
653
654
655       -C, --capture [ name ]
656              Provide only capture ports, unless combined with -D or  -P.  Op‐
657              tionally set capture device name.
658
659
660       -P, --playback [ name ]
661              Provide  only playback ports, unless combined with -D or -C. Op‐
662              tionally set playback device name.
663
664
665       -D, --duplex
666              Provide both capture and playback ports. This option is the  de‐
667              fault behaviour and can normally be omitted.  -D can not be com‐
668              bined with -P or -C.
669
670
671       -I, --input-latency
672              Extra input latency (frames).  (default: 0)
673
674
675       -O, --output-latency
676              Extra output latency (frames).  (default: 0)
677
678
679       -v, --verbose
680              libffado verbose level.  (default: 3)
681
682
683       -X, --snoop
684              Snoop Firewire traffic.  (default: false)
685
686
687       -h, --help Print a brief usage message describing only the
688              firewire backend parameters.
689
690
691

EXAMPLES

693       Print usage message for the parameters specific to each backend.
694
695
696              jackd -d alsa --help
697              jackd -d coreaudio --help
698              jackd -d net --help
699              jackd -d dummy --help
700              jackd -d firewire --help
701              jackd -d oss --help
702              jackd -d sun --help
703              jackd -d portaudio --help
704
705       Run the JACK daemon with realtime priority using the first  ALSA  hard‐
706       ware card defined in /etc/modules.conf.
707
708
709              jackstart --realtime --driver=alsa
710
711       Run  the  JACK daemon with low latency giving verbose output, which can
712       be helpful for trouble-shooting system latency problems.  A  reasonably
713       well-tuned  system  with a good sound card and a low-latency kernel can
714       handle these values reliably. Some can do better. If you get xrun  mes‐
715       sages,  try  a  larger  buffer.  Tuning a system for low latency can be
716       challenging. Please consult the JACK FAQ for more suggestions.
717
718
719              jackstart -Rv -d alsa -p 128 -n 2 -r 44100
720
721       Run jackd with realtime priority using the "sblive" ALSA device defined
722       in ~/.asoundrc. Apply shaped dithering to playback audio.
723
724
725              jackd -R -d alsa -d sblive --dither=shaped
726
727       Run  jackd  with  no  special privileges using the second ALSA hardware
728       card defined in /etc/modules.conf. Any xruns reported by the ALSA back‐
729       end  will be ignored. The larger buffer helps reduce data loss. Rectan‐
730       gular dithering will be used for playback.
731
732
733              jackd -d alsa -d hw:1 -p2048 -n3 --softmode -zr
734
735       Run jackd in full-duplex mode using the ALSA hw:0,0 device for playback
736       and the hw:0,2 device for capture.
737
738
739              jackd -d alsa -P hw:0,0 -C hw:0,2
740
741       Run jackd in playback-only mode using the ALSA hw:0,0 device.
742
743
744              jackd -d alsa -P hw:0,0
745
746
747

ENVIRONMENT

749       JACK is evolving a mechanism for automatically starting the server when
750       needed. Any client started without a running JACK server  will  attempt
751       to  start  one itself using the command line found in the first line of
752       $HOME/.jackdrc if it exists, or /etc/jackdrc if it does not. If neither
753       file  exists, a built-in default command will be used, including the -T
754       flag, which causes the server to shut down when all  clients  have  ex‐
755       ited.
756
757       As  a  transition, this only happens when $JACK_START_SERVER is defined
758       in the environment of the calling process. In the future this will  be‐
759       come  normal  behavior.  In either case, defining $JACK_NO_START_SERVER
760       disables this feature.
761
762       To  change  where   JACK   looks   for   the   backend   drivers,   set
763       $JACK_DRIVER_DIR.
764
765       $JACK_DEFAULT_SERVER specifies the default server name. If not defined,
766       the string "default" is used. If set in their respective  environments,
767       this  affects  jackd  unless  its --name parameter is set, and all JACK
768       clients unless they pass an explicit name to jack_client_open().
769
770       Defining $JACK_NO_AUDIO_RESERVATION will bypass audio  device  reserva‐
771       tion  via  session  bus (DBus). This can be useful if JACK was compiled
772       with DBus support but should run on a headless system.
773
774       $JACK_PROMISCUOUS_SERVER enables an alternate way of handling the vari‐
775       ous shared resources (Unix sockets, semaphores, ...). In this mode, the
776       generated names will not contain the user id anymore, and  the  permis‐
777       sions of those resources will be relaxed, allowing clients from differ‐
778       ent users to talk with the same server.  Moreover,  on  platforms  that
779       support  it  (all POSIX variants), if set to a valid Unix group name or
780       id, the permissions will be restricted to that group, so  only  members
781       of  that group will be able to launch clients that talk to this server.
782       Important note: it must be set with the same value for both server  and
783       clients to work as expected.
784
785

SEE ALSO:

787       <http://www.jackaudio.org/>
788       The official JACK website with news, docs and a list of JACK clients.
789
790       <http://www.github.com/jackaudio/>
791       The official JACK github code repository. Pull requests are welcome.
792
793       <http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org>
794       The  JACK  developers' mailing list. Subscribe to take part in develop‐
795       ment of JACK or JACK clients. User questions are also welcome, there is
796       no user-specific mailing list.
797
798       <http://www.jackosx.com/>
799       Tools specific to the Mac OS X version of JACK.
800
801       <http://www.alsa-project.org/>
802       The Advanced Linux Sound Architecture.
803
804       <http://www.ffado.org/>
805       The Free Firewire Audio Drivers (FFADO) Site.
806
807       <irc.freenode.net#jack>
808       Join the JACK community with your favourite IRC client.
809
810
811

BUGS

813       Please report bugs as issues to the corresponding repository:
814       <http://www.github.com/jackaudio/>
815
816
817

AUTHORS

819       Architect and original implementer: Paul Davis
820
821       Original  design  group: Paul Davis, David Olofson, Kai Vehmanen, Benno
822       Sennoner, Richard Guenther and other members of the Linux Audio  Devel‐
823       opers group.
824
825       Programming:  Paul  Davis,  Jack  O'Quin, Taybin Rutkin, Stéphane Letz,
826       Fernando Pablo Lopez-Lezcano, Steve Harris, Jeremy  Hall,  Andy  Wingo,
827       Kai  Vehmanen,  Melanie  Thielker, Jussi Laako, Tilman Linneweh, Johnny
828       Petrantoni, Torben Hohn.
829
830       Manpage written by Stefan Schwandter, Jack O'Quin, Alexandre Prokoudine
831       and Thomas Brand.
832
833       Create a PDF file from this manpage:
834
835              man -t jackd | ps2pdf - > jackd.pdf
836
837
838
8391.9.21                            August 2022                         JACKD(1)
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