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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961 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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1answer
474 views

Error using fluidsynth

I installed fluidsynth following the instructions here: http://sourceforge.net/apps/trac/fluidsynth/wiki/Download ...which were just sudo apt-get install fluidsynth But get the following error when ...
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4answers
1k views

No more sound after running Ardour

All the sound works perfect with all the applications on my system. But from the moment I launch Ardour, no more sound comes out from other application than Ardour. The easy way to get it back is to ...
4
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1answer
228 views

USB Audio card fails to initialize after turning it off and on again

I have a problem with an "E-MU Tracker Pre" USB audio card and Kubuntu. When I start the audio card for the first time since boot everything works fine, but after turning it off and on again, ...
1
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0answers
96 views

Uninstalled jackd* and sound doesn't work

I used apt-get remove jackd* and it removed all the following packages: fxcyberjack tuxguitar-jack libjackrabbit-java liquidsoap-plugin-jack slv2-jack qjackctl jackmeter jacktrip jack-capture ...
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2answers
6k 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 ...
2
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0answers
1k views

JACK error starting server using FireWire drivers

I've been trying to setup an Edirol FA-66 audio interface in Ubuntu 12.04 LTS, so that I can record sound coming from two microphones conected to it. The interface is connected to my computer using a ...
0
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2answers
1k views

jackd does not work, aplay -l shows two instances of the same card (Ubuntu 13.04, HDMI audio only)

I'm on Ubuntu 13.04, using a ZaReason Zini, which as far as I can tell has no audio output other than its hdmi port. I'm trying to get the Clojure library Overtone working, and ran into the problem ...
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1answer
612 views

13.04 hp laptop dv6t intel quad edition no headphone sound when plugged in

this is my alsa output http://www.alsa-project.org/db/?f=5dba3e3cc98914f6dce181eaa548769da5a0e6d8 I have followed this old solution that solved my problem for ubuntu 12.04, but in 13.04 the say ...
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0answers
261 views

Ubuntu freezes with Presonus FP10 plugged into JACK [closed]

I want to use my Presonus FP10 with jack and Ardour in Ubuntu 12.04 (64 bit). Here are some outputs: kane@tripkane:~$ ffado-test ListDevices Cannot create thread 1 Operation not permitted ...
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1answer
754 views

jackd server will not start exit code 225

Could anybody explain the errors I am receiving using jackd with qjackctl 13:25:50.333 ALSA connection graph change. 13:26:11.822 JACK is starting... 13:26:11.822 /usr/bin/jackd -r -dalsa -dhw:2 ...
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3answers
533 views

Acoustic Guitar how can be connected to Ubuntu and make it sound like Electrical guitar to make metal sounds?

I have a Acoustic Guitar, which has audio output jack is there any way i can connect that jack to Ubuntu microphone in and then use some existing software which will make the Guitar sound like metal ...
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1answer
963 views

Python script to change the jack from input to output does not work in 13.04 [closed]

To change the jack from input to output for any computer or laptop I followed this question: How do I change which audio jacks are used for input and output? But the Python script does not work. ...
4
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1answer
10k views

Need external (usb)Sound card suggestions that work with Ubuntu 12.04

I don't know if this is the right place to ask about this, but I'll give it a try. I'm a linux user for a while now and I try to avoid opening Windows as much as possible. But for some things, I just ...
1
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1answer
373 views

How to use MIDI keyboard with seq24

I want to set some MIDI from a MIDI keyboard on a loop using a sequencer, and it seems like seq24 would be the simplest way to do this. However, seq24 doesn't show up in JACK connections, and I don't ...
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3answers
1k 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 ...
10
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1answer
5k 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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1answer
2k views

Unable to start jack server ? Service is available (org.jackaudio.service aka jackdbus).

Im trying to start jackd using QJackCtl but it fails with error messages Here is what I'm seeing - 14:36:48.194 Patchbay deactivated. 14:36:48.198 Statistics reset. 14:36:48.228 ALSA ...
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0answers
155 views

certain sounds don't work after I start JACK

I have ubuntu 12.10 on an acer aspire one 722 with ALSA & an ATI soundcard. So, i finally figured out how to start JACK; I type in jackd & qjackctl & jack_mixer and then open a new ...
6
votes
2answers
1k views

Guitarix amp simulator “Failed to allocate memory” jackd

Has anyone any experience with Guitarix ? I have Jack set up and working well with Rakarrak but it wont work with Guitarix It tells me "could not allocate memory" dont understand why. Am I missing ...
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0answers
380 views

JACK showing “Active” and I'm getting no sound [closed]

When I am starting JACK it is now showing "Active" instead of "Started" and I am getting no sound. I'm hoping there is a easy fix to this as I am kinda new. It shows the following in the messages ...
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1answer
744 views

too many xruns in jack

I'm getting a lot of xruns in jack--about one every .5 seconds. I have been told that this is a very computer specific problem that could have a lot of causes. Is there anyone here who could advise me ...
9
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3answers
11k views

“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 ...
3
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1answer
8k 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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1answer
656 views

no sound zynaddsubfx and JACK wont run

I am trying to run zynaddsubfx. When I start from the command line, I get this: http://paste.ubuntu.com/1378693/ When I start JACK I get this: http://paste.ubuntu.com/1378694/
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1answer
392 views

Connect 4.1 speakers to Acer V3-571G with Ubuntu 12.10

I have the Acer Aspire V3-571G that has only 2 audio jack: 1 for headphone and 1 for microphone. Can I connect my Creative 4.1 speakers and have sound in all 5 channels? The problem is that speakers ...
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2answers
2k views

Using Jack audio and getting audio to play though headphones

I need to use Jack audio to prevent clicks but I'm having problems getting jack to play though my usb wireless g930 headphones. I'm using puredata and I can get my usb wireless g930 headphones to ...
0
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1answer
366 views

What changed with timidity, alsa and jack in 11.10?

I (just) upgraded from 11.4 to 11.10 and noticed some differences in the behavior of timidity. I used to (11.4) exectute >timidity midifile.midi without running jackd, and thus using alsa (or ...
2
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0answers
926 views

removing pulseaudio, moving to jack

I have installed jack because I want to use the LADSPA plugins available, in jackrack, for realtime audio processing. (I couldn't find any way to use them with pulseaudio) After much effort, I ...
4
votes
1answer
4k views

Unable to start jack (Cannot allocate memory)

I want to use PulseAudio on top of jack, so I've turned pulse off and now want to start jack using qjackctl. However, this results in the following error log: 22:14:15.933 Patch Panel disabled ...
0
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1answer
363 views

QJackCtl - Alsa Unknown driver

Here's my problem : I just have installed QJackCtl on my Ubuntu 12.04 and when I start Jack I got this issue : 12:01:22.769 /usr/local/bin/jackd -dalsa -dhw:0 -r44100 -p1024 -n3 -i1 -o2 Cannot ...
6
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2answers
10k views

Step-by-step to run a midi keyboard input device? 12.04

I have a Korg Nanokey, and I'd like to make it produce sound in ubuntu. I've read that means I should be using Rosegarden, and that Rosegarden uses JACK, but does not install it. (Although checking ...
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2answers
1k views

12.04 Ubuntu studio PREEMPT_RT kernel options

My audio processing needs require a preempt_rt kernel. I roughly followed the guide: https://wiki.ubuntu.com/KernelTeam/GitKernelBuild with a little help from: ...
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1answer
1k views

No sound on Rakarrack 6.0.1

I just installed Rakarrack and get no audio. I'm using Ubuntu 12.04 LTS. Help is appreciated.
5
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1answer
623 views

Are there any tutorials for Linux-based audio production? [closed]

I have been searching for a while for Linux based audio production tutorials. All I can find are tool based tutorials. For example I found tutorials on how to use jack, ardour, lmms ..etc. What I need ...
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3answers
187 views

What can I do about the fglrx driver interfering with jackd?

The jack-audio-connection-kit needs to run in realtime mode and my system is configured accordingly. I'm using the fglxr driver. With Unity-2d everything is fine. With Unity-3d, jack-clients ...
2
votes
1answer
761 views

QjackCtrl audio server starting. Focusrite Saffire PRO40 card start and no sound

QjackCtrl server is starting. Then the FW Active LED of the soundcard turn on. I try listenning to a Youtube video and I get no output sound. The card connection setup is working on Windows. Setup: ...
4
votes
3answers
914 views

Record audio from Skype on VPS?

I have impossible task to do! Going crazy! On fresh Ubuntu server 10.04. install, via SSH I've installed desktop and VNC server. Then Skype. Problem is that Ubuntu is VPS! And it don't have physical ...
3
votes
0answers
726 views

How do I get a MOTU 828 MK II working? [closed]

I recently installed Ubuntu 11.10, which is proving to be a nice OS - it's pretty fun to learn. I was wondering how to get Ubuntu to recognize my MOTU 828 Mk II firewire audio DSP (?) unit. It's ...
2
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3answers
2k 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.
2
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2answers
3k views

MIDI to VMPK to QSynth to Audio?

I'm currently using Jack (qjackctl) + VMPK + qSynth to try to simply jam a little bit on my keyboard on my Linux machine. I can see all of the inputs and outputs, but I'm still not getting any sound. ...
4
votes
1answer
1k 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
1k views

JackD mutes PulseAudio

I use rakarrack for guitar effects and I want to listen mp3 playback (Banshee etc.) and midi (Tuxguitar etc.). But when I start rakarack it starts JACK and JACK mutes all other sound sources except ...
1
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0answers
295 views

Jackd does not work with winesasio and FL Studio [closed]

I'm trying to get FL Studio to work using wineasio and jackd, but so far: no luck. The problem lies with jackd and pulseaudio. I can start jackd and have pulseaudio piped through it, but no sound ...
0
votes
1answer
931 views

FA-66 sound card sometimes cuts out and stops working, causing me to restart Jack

I have setup Ubuntu 11.04 to use Jack and PulseAudio just to get sound working. It was a little tough, but I got it to work. Now as I use my computer - like Banshee, Youtube, or VLC - the FA-66 will ...
9
votes
2answers
14k 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 ...
4
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2answers
2k 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: ...
7
votes
5answers
41k views

Using microphone input port as headphone output

I have one audio output jack and one audio input jack on my laptop. I want to use it for real time audio mixing, and I need to have another discrete output for headphones that is independent of the ...
2
votes
1answer
1k views

Jackd fails to start

I'm trying to have a setup where JACK interfaces directly to ALSA and pulseaudio communicates to JACK. This setup worked OK (I had to manually start things a few times) but as I understood the Ubuntu ...
3
votes
1answer
301 views

Renoise and dssi and jack

This may be a little complicated, but, is jack a necessity? I mean, i use renoise, and, since i dont have the need for low latencies, do i really need to use it? My basic setup ( or workflow ) is ...