JACK is a low-latency sound server, allowing multiple applications to connect to one audio device, and to share audio between themselves. Many Professional-grade programs (such as Hydrogen and Ardour) on Ubuntu utilize JACK for maximum hardware compatibility and performance.

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Cannot find installed Xsynth-DSSI

Hi i have installed the Xsynth-DSSI package right now together with the add-on dssi-host-jack. Now I cannot find the programs because none of the commands ''type [wx]synth{0,1}(-dssi)'' nor ''type ...
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1answer
77 views

Distorted sound from headphone jack Ubuntu 14.04.1 LTS

I am reaching out for a help to diagnose and to fix the problem I am having on my Ubuntu box. The OS: Linux 3.16.0-51-generic #69~14.04.1-Ubuntu x86_64 GNU/Linux Desktop with default Unity Desktop ...
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1answer
21 views

JACK breaks audio. How do I fix it?

Audio was working fine until I tried to use qjackctl and qsynth to play a MIDI keyboard. I followed this answer* to setup the keyboard and it worked. But then I noticed other applications couldn't ...
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4answers
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“JACK server could not be started” when using Qjackctl

I have a problem when I try to connect my guitar to my computer, via line input. Audacity works well, and I can record what I play on my guitar (selecting from Preferences from where to record to ...
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9 views

Do Iceweasel or Chromium browsers directly support JACK audio?

I found nothing while googling for JACK audio support of Chromium and Iceweasel. Still, I wanted to ask the question here in case I missed something. Thanks.
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26 views

How to set up Jack + Alsa to show, by name, all ports on sound card

I know I could probably find what I'm looking for by going through a ton of documentation, but hopefully I can find a concise answer here that more directly explains what I'm trying to figure out. I ...
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16 views

64bit jackd with 32bit clients

Is it possible to use 64bit Jack Sound Server with 32bit applications like Wine, vsthost, Renoise? I'm trying to use this configuration but I got no sound and midi.
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18 views

HP ProBook 6550b Headphone Jack does't work (no sound)

The title states it all. I would appreciate some help. I tried several methods found here but with no use whatsoever.
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1answer
1k views

switch audio output from PA to jack, breaks audio on google-chrome

I occasionally switch audio output from the ubuntu default pulse-audio to jack. this has created several problems that I haven't managed to fix in the past (no sound from firefox ever again, then ...
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15 views

Connecting to Jackd server

I'm not sure how I'm meant to set this up. I have the qjackctl GUI installed and I have used the following settings - Before starting the server from the following GUI - I can hear a song ...
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1answer
859 views

How do you get rosegarden to play sound when playing a midi in it?

How do you get rosegarden to play sound when playing a midi in it? Do I need Jack running?
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1answer
186 views

How to get to a perfect jackd configuration that works trouble-free and out of the box?

While working on a PPA to provide binaries for Sonic Pi, the users of the PPA binaries keep stumbling over jackd. How to make things easier for them? Sonic Pi is an educational music tool that ...
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Ubuntu 14.04 LTS 64bits - Jacktrip - Is it possible to install librtaudio4v5 or do I need 15.10

I was trying to use jacktrip, a software which allows to transfer audio streams over the internet so to perform music remotely. https://github.com/jcacerec/jacktrip Unfortunately, I realized that ...
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1answer
55 views

cant compile audio software

I tried to install an audio software (SO-KL5 synth). My distro is Ubuntu 14.04 LTS. When I try to compile the software, it says it cant find jack and ALSA header files. Where are these files? Edit ...
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2answers
228 views

Ubuntu Studio 14: Suddenly no sound from jack

My home studio setup was performing fine, when something crashed the jackdbus. I rebooted the computer, and now I can't hear anything from my system outputs. Capturing still works fine, and playback ...
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62 views

No media play in any application after opening a DAW like Ardour or Qtractor

I'm a rather new Linux user, using Ubuntu Studio for about a month now. I've been having issues with audio and video playback not working in any application whenever I open Ardour or Qtractor. This ...
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1answer
167 views

Volume too low after connecting Pulseaudio to JACK

I followed the tutorial mentioned here but after the sound is much quieter even at 100%. I have loooked at the Pulseaudio volume controls and alsamixer and they are all also at 100.
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1answer
224 views

No volume control after joining PulseAudio with Jack

I have installed and configured jackd server following the Fedora's Integrating PulseAudio with JACK tutorial. The integration was successful. But now I'm not able to controll PulseAudio's volume ...
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2answers
428 views

How do I route an USB Audio Interface (MBox2) to a DAW (Qtractor) via Jack or Patchage as an audio channel?

I'm borrowing an Mbox2 Mini and want to play around with this in Ubuntu 15.10 with gnome. In with jack, I can see it as a MIDI device: However, I can not see it as an audio input device: My ...
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61 views

Ubuntu & Ardour + jack

I've been trying to figure out how PulseAudio works with Jack, but I can't seem to find it. I've always used Fedora so I didn't have this issue. I install qjacktctl and Ardour4, but when I link ...
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35 views

How can I properly use both Alsa and Jack?

I installed Ubuntu, and everything was working fine. Then I installed Jack to record music and interface with my MIDI keyboard. Then I ended up in the weird situation where I could hear my synth and ...
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15 views

connecting jack muse and zynaddsubfx

I can get sound from zynaddsubfx through its Jack connection. However I can not get the pianoroll in muse to connect to Jack. I have looked at YouTube tutorials, etc. I connected, I think, Zyn to ...
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1answer
142 views

USB Audio Interface not showing device in list for Pulseaudio

There are a lot of questions around this, I must have gone though about 10 to see what's wrong. I have a Behringer FCA610 usb audio interface that I use as my primary card. In Ubuntu 14.10, I simply ...
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33 views

Set up jack2 server on ubuntu 15

I'm trying to make my lmms 1.1.3 installaton work with jack2, but I have no idea which packages I should install and what should configure to make it work. I've tried to install jackd2 and qjckctl ...
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1answer
2k views

How to avoid XRUN callback skips

After I set QjackCtrl and Arour, I can record fine, but XRUN callback skips are annoying. This is my QjackCtrl configuration: In logs I see: 18:37:22.041 XRUN callback (97). 18:37:22.793 XRUN ...
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1answer
17 views

QJackCtrl Activate Patchbay persistence

I am trying to use Patchbay persistence with QJackCtrl to help manage my connections. However when I go to try and activate it it doesn't seem to create a file for me (for the settings). I also can't ...
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1answer
64 views

jack2: error while loading shared libraries: libjackserver.so.0

I'm running 14.04 64-bit. I downloaded the source tarball file (1.9.10) for jack2, unzipped it and then cd'd to the root directory. sudo apt-get install libsamplerate0-dev sudo apt-get install ...
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2answers
11k views

Problem starting JACK server “Jack Server is not running or cannot be started”

I am a professional pianist from New Delhi, India. I had always been a fan of Linux over Windows. Since I'm a musician, I downloaded some DAWs to try them out. I had read about JACK and that it helps ...
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2answers
9k views

Jack Audio ubuntu 12.10

I used to have Jack Server working with 10.10, 11.04, 11.10 but not 12.04 and now 12.10. I have installed jackd jackd2 qjackctl surfed many forums and even given advice of how to get jack working, ...
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2answers
3k views

Can it be harmful to grant jackd realtime priority?

I am apt-get installing Ardour, a sound mixing program, just to try it out. Installing Ardour also installs JACK, a dependency. As part of the JACK installation script, I get the following dialog: ...
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2answers
4k views

How to use JACK and Pulseaudio/ALSA at the same time on the same audio device?

Whenever I launch hydrogen it breaks my audio in all other applications which use Pulse, for example, I can no longer play videos in Chrome after having launched Hydrogen once, until I restart my PC ...
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82 views

JACK and PulseAudio multiple sinks

I successfully configured PulseAudio to run ontop of JACK by following this surprisingly easy description. Now I wonder if there is a way (at first I was certain of it) to have multiple sinks between ...
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44 views

JACK Audio muting Speakers but not playing through Headphones

I successfully configured PulseAudio to run ontop of JACK by following this surprisingly easy description. Now I only struggle to use my headphones. As PulseAudio would do until now, when inserting ...
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1answer
178 views

“Jack audio server could not be started” in QJackCtl

I have been trying to start the JACK audio server in QJackCtl, but I get the message: DBUS: Jack server could not be started. Sorry So the symptoms of my problem are exactly the same as in this ...
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30 views

Using JACK Audio Kit I get feedback (echo and reduced volume) when I start the server

Greetings and Thank you - I installed Jack2 hoping to get Rivendell to actually play. after a lot of hours I have Jack running (started via the GUI) and can see the connections in the connection ...
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35 views

Jack audio how to loop back multiple USB sound cards

I started using JAck audio a day ago and I want to know how to loop back multiple USB sound cards with some c code. I am unable to find a server program in the examples because it runs as a server ...
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1answer
56 views

Wine Installation conflict with Ardour / Jack

i tried to install wine via the software center (version wine1.6 1:1.6.2-0ubuntu4) and console. In both cases wine wants to uninstall Ardour, Jack, Rosegarden and a few more. How can i install wine ...
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1answer
24 views

How to do advanced MIDI keyboard routing?

I want to replicate a specific model of e-piano on my MIDI keyboard. To do this, I must send white keys to one synth application, and black keys to shift down half a tone and send to another synth. I ...
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2answers
9k views

How to do screencasting (desktop recording) with high quality audio and video?

I have googled around and found all the usual solutions. None of them work for me. First of all, I want to make high quality recordings. Second, I use JACK audio (PulseAudio is completely ...
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2answers
6k views

How do I switch between Pulseaudio and Jack on Ubuntu 12.04 LTS x86 Linux?

There are some applications on my Ubuntu 12.04 which requires Jack. Without Jack they just won't start, so I have to keep Jackd + (QjackCtl). Now the problem is jackd is not starting properly all the ...
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2answers
17k views

Virtual MIDI Piano Keyboard setup

I installed Virtual MIDI Keyboard (vmpk) using apt-get install. I also have Jack control and Qsynth installed. When I open vmpk, I cannot hear the sound coming from it. How can I do the setting to let ...
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1answer
2k views

How can I use Jack for all my system sounds?

I have a firewire soundcard (Phonic FireFly808 [not the "808-U" version!]) which I would like to use as my standard soundcard. From what I found out, it seems like only ffado could get this firewire ...
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1answer
308 views

Red light from headphone jack Macbook Pro running Ubuntu 14.04

I'm getting a red light from the audio jack on a 2012 Macbook Pro. I'm running Ubuntu 14.04. Sound works fine, headphones or speakers, but whenever the sound is on the light comes on. It usually turns ...
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42 views

Use webcam with PulseAudio while JACK is running?

I use JACK Audio Connection Kit with pulseaudio-module-jack so that all of my PulseAudio apps play sound through JACK. It works perfectly for 99% of my needs but I've found that JACK grabs my webcam ...
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257 views

Python script stopped working: Cannot autolaunch D-Bus without X11 $DISPLAY jack server is not running or cannot be started

I have a Python script on a Raspberry Pi that streams radio. It was working great for a long time, but today not so much. Here is a reproducible example that produces the error message: import pygst ...
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3answers
2k views

Playing a MIDI keyboard without JACK / how to use JACK and PulseAudio/ALSA

So, I havea MIDI keyboard but I'm not really motivated to play when I have to set up JACK and everything else just to get one sound out of it. The problem is that whenever I start JACK I can't play ...
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14 views

Using Jacks in Patchage

I just installed patchage, but My jacks (mic and headphones) are not showing up. Do I have to install some more package, to configure something with ALSA or pulseaudio ? Regards, FliiFe
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2answers
3k views

Running jackd on startup / replacing PulseAudio

How can I replace PulseAudio with Jack? I want to start jackd on startup either during boot or during logon instead of PulseAudio.
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1answer
57 views

Overlapping system and Rakarrack playbacks on a X-Fi Gamer soundcard (setting up guitar)

I've gone through installick JACK and Rakarrack. I then had the problem with other audio (like YT flash videos or music player) disappearing when I turn on JACK etc., I've just installed pulseaudio ...
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1answer
893 views

Unable to install libjack-dev [duplicate]

I am on Ubuntu 14.04. 64-bit and I am trying to install linuxband. To do I need to install the package libjack-dev, but when I do so I obtain the following message: Some packages could not be ...