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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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
22 views

What is the “buffer size” (audio) and how to choose the best amount of buffer size?

I'm learning about jack. There's something called the "buffer size" and is measured in samples. What is it and how to choose a good buffer size?
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1answer
42 views

Digitech USB multi-effect with Jack

I'm newbie in Ubuntu and I'm having a hard time to work with jack audio. I have started to use Ardour and the problem is the Jack server apparently does not recognize my digitech rp500 pedalboard ...
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28 views

When I open Rosegarden something strange happens

Okay. Now I'm listening to some music on audacity (an audio playback program). Then I open up Rosegarden. Audacity just "stops". I also think all other sounds don't come out any more. Anyway; I took ...
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2answers
1k 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 ...
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5answers
34k 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 ...
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2answers
110 views

Play audio on Ubuntu Core!

I installed Ubuntu Core 14.04 AMD 64. Now I want to play an audio! What exactly should be installed?! (I got this message on webkitgtk: jack server is not running or cannot be started) I got this by ...
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55 views

Unable to install libjack-dev

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 ...
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1answer
102 views

Audio interface: how to use it as a sound card

I just bought Focusrite Scarlett 2i2 since I heard good things about it, especially of its good Linux compatibility. I connected it with my computer via the USB cable and sent its line output to my ...
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1answer
47 views

how to call using a synthetic voice in Skype

My goal is to use a synthetic voice in a Skype call. This could be used in a scenario such as being in two meetings at once (one local, one remote) and not being able to speak out loud (in the local ...
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45 views

Jack's sound not working

I installed alsa and JACK for using sooperlooper. Alsa is working fine (tried it with audacity), but when I connect something to system, capture or playback, it won't capture or play sound. Here's the ...
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119 views

Start jackd with realtime priority with upstart

I'm trying to start jackd with realtime priority at boot with an uptstart script but with no success so far. I'm using ubuntu server 14.04. My upstart version is 1.12.1. The user and group I'm using ...
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26 views

Bluetooth headphones with electric guitar

I am unable to listen to my electic guitar on my Bluetooth headphones. At present I can listen A-OK with: Lindy USB guitar cable QjackCtl Rakarrack Wired headphones The Bluetooth headphones work ...
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1answer
51 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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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 ...
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46 views

Cannot get jack & guitarix to work with my Line6 Toneport

OK here is my delima, I am pretty good with Ubuntu but when it comes to jack and using my guitar I have struggled with getting this to work! I am running Ubuntu 14.04 and want to use my Line 6 ...
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0answers
30 views

How to connect jack-keyboard to amsynth using JACK?

I want to connect the virtual jack-keyboard to amsynth, but I can't get any sound out of the notes. I have connected the applications using JACK like this: The output from amsynth to my speakers is ...
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3answers
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 ...
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1answer
64 views

how do I disable the headphone jack so sound will come out of the speakers?

I just installed ubuntu 12.04 (it still has windows 7 on it but I can't access it I don't think) on my moms older and pretty beat up laptop. the thing has a few problems like needing the keyboard ...
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132 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 ...
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36 views

Route two USB mics to Virtual Sound Device

I have 2 USB mics - I'd like to use them to record in stereo using Audacity, but it can only capture on one device at a time. I can easily switch between the two mics, but I can't select both at the ...
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0answers
47 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
85 views

JACK turns off other sound

I have a midi keyboard connected to qSynth through jack, which works fine. But when I try to play other sound(from chrome, vlc, etc.) it is completely silent. How do I fix this?
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593 views

Jack - Setting up the interface and audio outputs with onboard soundcard- How?

I'm trying to set up Jack on my Ubuntu 14.04. I want to use my internal sound card (USB audio interface is sent back for repair) I have many options to choose for in the audio configuration, i tried ...
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1answer
275 views

Output analogue audio (via speakers) through “line in” jack

...So I've been using Ubuntu for about 6 months now since I switched from Windows. I've been searching for one specific feature that was missing for Ubuntu... In Windows I used to connect my ...
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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 ...
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71 views

Howto to assing a second audio automatically to jack or alsa?

i'm using a Guitar-Link (Behringer UCG102) over USB, a AKAI MPK25 Masterkeyboard and some Software to making music with jack, Ardour, Hydrogen, ZynAddSubFX... After plug my USB Behringer UUCG102 in ...
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262 views

Several issues when trying to start jack server.

Configured or not starting jack server always results in this crash on my machine: JACK server starting in realtime mode with priority 10 ERROR: control open "/dev/audio" (No such file or directory) ...
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1answer
197 views

Convert TuxGuitar Drum Track to Addictive Drums

The scenario: Use TuxGuitar in Ubuntu 12.04 to Compose a Guitar Track and a Drum (Percussion) Track Practice song on Guitar while listening to TuxGuitar play the track(s) through the Gervill MIDI ...
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32 views

Audio Router / Patchbay

I have a desktop that has a integrated surround sound jacks on the back, (the green/yellow/black/etc)... Anyway, I want to take one line input, and split it to at least two other (ideally stereo) ...
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0answers
81 views

Headphone jack physically broken and that automute the speakers after about 1~2 minute

I have a annoying problem in my Asus X52F laptop running raring Ubuntu. My headphones jack had physically broken last mount and after this event the audio output automute after 1 to 2 minute of ...
2
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1answer
283 views

Audio over ethernet

I am not sure whether this is the right place for asking this question, but anyway I would like to give it a try. I want to transport audio over ethernet. I want to do a simple experiment with it. ...
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1answer
553 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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0answers
900 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 ...
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0answers
98 views

Kubuntu studio. compositing settings and firefox, networkmanager popup issue

I'm moving over to an ubuntu variant after some time with linux mint. I'm using Ubuntu studio 13.10 with the kde desktop. I like kde and I am a musician, so the low latency kernel and preinstalled ...
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0answers
17 views

“Starting jack server… Cannot connect to server socket err = No such file or directory” [duplicate]

I am trying to start jack audio server. It works the first time after i restart but then it says "D-BUS: JACK server could not be started. Sorry" and i get a long message. Do i need to stop pulseaudio ...
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2answers
6k 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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0answers
52 views

Sound disables completely when running Qsynth?

I'm having a lot of trouble trying to set up my M-Audio Keystation Mini 32 on my Ubuntu. I've read many articles on setting up Jack and then setting up Qsynth. When Launching Qsynth, my audio device ...
0
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1answer
983 views

No sound from external speakers/headphones (jack)

I've got constant problem, after instaling Ubuntu 13.10. I get no sound from the audio jack (speakers, headphones etc) but my internal speakers work right, playing sound as they should. Tried many ...
6
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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 ...
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. ...
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 ...
0
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1answer
72 views

Multiple kernels choices realtime or no realtime

I have a dell latitude d510 currently running xubuntu 13.04 and linux 3.8. I want this machine to host JACK processes together with EDIROL UA-25 during a live session and therefore, it needs an RT ...
4
votes
1answer
198 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, ...
0
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1answer
117 views

Jack and webcam videorecording

Is there any means to record sound and video from the webcam and microphone while jack is operating? Cheese stops recording when I start jack. VLC can output in jack and apparently record sound ...
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0answers
810 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 ...
0
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1answer
297 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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0answers
19 views

how can i route audio from rarack to a ardour?

I am a guitar player, and I use ardour to record my audio, and rarack as my effects panel. But I need a way to route the output sounds from rarack to ardour, and still have a audio output. Any ideas?
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0answers
66 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 ...
3
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2answers
3k 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 ...