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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1answer
9k 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
279 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 ...
1
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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 ...
9
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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 ...
1
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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 ...
1
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0answers
138 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 ...
1
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0answers
350 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 ...
0
votes
1answer
571 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 ...
7
votes
3answers
7k 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 ...
2
votes
1answer
7k 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, ...
0
votes
1answer
560 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/
0
votes
1answer
361 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 ...
1
vote
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
votes
1answer
325 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
votes
0answers
863 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 ...
3
votes
1answer
5k 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
votes
1answer
319 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 ...
5
votes
2answers
7k 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 ...
0
votes
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: ...
-1
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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
votes
1answer
565 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 ...
1
vote
3answers
178 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
703 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
811 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
604 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 ...
1
vote
2answers
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
votes
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 ...
1
vote
1answer
995 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
vote
0answers
281 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
893 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 ...
7
votes
2answers
12k 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 ...
3
votes
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
35k 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
2k 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 ...
2
votes
1answer
284 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 ...
5
votes
2answers
614 views

DJPlay: No sound coming out

I installed JACK and DJPlay on Ubuntu 10.10, they seem to launch and connect fine. Then I open audio files in DJPlay, and start playing them, the oscilloscopes start moving. But no sound comes out. ...
3
votes
3answers
2k views

jack sound server how to?

how to setup jack sound server for any music program ?
1
vote
1answer
160 views

Copying default puredyne audio settings?

I would like to use Ubuntu as my main operating system but I get too many xruns when I run jack. I tried several solutions I found online but I could not solve the problem. I am very happy with the ...
6
votes
2answers
2k views

Jack and pulseaudio

I want to run pulseaudio from startup to deal with system sounds etc and be able to run jack from qjackctl for use with audio applications (LMMS, ardour, rosegarden etc) I'm having issues when i start ...