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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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
19 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 ...
3
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1answer
198 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 ...
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0answers
39 views

Cannot connect to server socket err = No such file or directory when using QjackCtl

When I try to start a jack server I get these error messages and also a window pops up saying: Could not connect to JACK server as client. - Overall operation failed. ...
0
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1answer
19 views

JACK audio server stopping other media from playing

I've just installed ShowQ which requires a JACK audio server to output audio. I've got that working fine, however once I open ShowQ other audio sources will no longer play (youtube videos, online ...
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0answers
20 views

dssi-vst on 64 bit for use with Qtractor?

I'm wondering how to use Windows VST plugins with Qtractor, as I have yet to find VST instruments such as string sections and other orchestral instruments that are native to Linux. LMMS was good for ...
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0answers
17 views

What are possible reasons of regular sound glitches on recording with jack

I use jack connection kit (cadence with jackd) with my external USB audio card to record audio in Audacity. The problem is that regularly (about each 4-5 minutes of recording) a 'glitch' sound is ...
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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
3k 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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1answer
50 views

No sound anymore on Ubuntu 14.04

I tried Renoise on Ubuntu 14.04, but it complained about Jackd and ALSA threads. I installed pulseaudio-module-jack and jackd hoping that it would help. It didn't. Instead I now lost all my sounds ...
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0answers
62 views

Pulseaudio doesn't work with Jack

At my wits end with Pulseaudio and Jack. I have followed every how to guide I can find, I've installed and reinstalled the Jack sink and source modules for PA and tried Qjackctl and Cadence. I am at ...
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0answers
142 views

How to configure qjackctl to combine output from mplayer and rakarrack? (“Audio device got stuck!”)

If I launch rakarrack (without jack qjackctl), I do get sound output to my speakers from the guitar input. However, if I try to launch mplayer, to be able to play along a song, it gives "Audio device ...
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1answer
519 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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0answers
67 views

Alsa modular synth doesn't start

I try to open ams. But it doesn't work. I installed jackd. But until now I don't know how to solve the problem. Do you need more information? Thanks in advance! Here is the error message. ...
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1answer
24 views

HP Pavilion dv6000: Jackd problem: (Ubuntu 10.04) I can't start Rakarrak, Mixx, Internet DJ Console and etc

I have Ubuntu 10.04 (I tried higer, but unity is lagging; yes it's Ubuntu 10.04, it's only theme) and I can't start Rakarrak, Mixx, Internet DJ Console and other programs for mixing songs. It's ...
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0answers
59 views

Play on Linux Audio Problem 14.04

For recording gameplay I use simple screen recorder and for audio I use jack and pulseaudio. My steam games default to my headset but to record I need it to go to jack sink. But when I go into Pulse ...
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0answers
50 views

Audio spikes to full power at random

I'm running Ubuntu 14.04.1LTS and I keep getting these annoying volume spikes at random. I'll be listening to something and the volume will spike to full blast. The only solution I've found is to ...
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1answer
112 views

Alsa ok, but no audio from Jack

So I run qjackctl and click start. It shows no errors, but there is no sound at all from any application. When I stop qjackctl it all starts working. I have no idea how to debug this :( Specs: HP ...
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2answers
346 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?
2
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1answer
273 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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1answer
325 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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0answers
273 views

Increasing ALSA's buffer size

I'm trying to change ALSA's original buffer size, in order to increase it. Until now, I had no luck. I've tried to execute the commands listed in http://pastebin.com/4FibYN0U, however,I don't have ...
0
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1answer
47 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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4answers
2k 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
106 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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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 ...
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0answers
89 views

update jack audio server package in ubuntustudio 14.04 from 1.9.9.5 to 1.9.10

can someone tell me how can I install jackd2 package in ubuntu studio 64bit 14.04? jack version 1.9.10 was publiced july 2014, so it was not part of ubuntu studio 14.04. I believe it is part of ...
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0answers
87 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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0answers
47 views

Ardour 3 Jackdbus not quitting

Is there a solution to the problem of jackdbus not quitting after Ardour closes in Ubuntu 14.04LTS? I have seen other references to the problem but no solution. My workaround is to launch System ...
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0answers
41 views

Jack not working with usb Microphone

I have a usb microphone that works with alsa but when I set it up for jack in Audacity nothing is being recorded I've tried each of the settings/options for the microphone in jack and both options in ...
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1answer
213 views

USB MIDI keyboard Akai LPK, jackd

I got Akai LPK25 and I am trying to make it working on my Ubuntu. I tried to follow a tutorial http://terokarvinen.com/2014/usb-midi-keyboard-on-linux-akai-lpk25-professional, but when I run ...
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0answers
707 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
67 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?
1
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1answer
131 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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0answers
39 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 ...
6
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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 ...
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 ...
4
votes
2answers
197 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 ...
0
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1answer
913 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 ...
1
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1answer
215 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 ...
0
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0answers
83 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 ...
0
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0answers
78 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 ...
9
votes
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 ...
0
votes
0answers
102 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 ...
0
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0answers
102 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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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 ...
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0answers
65 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
92 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.
0
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1answer
122 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?
0
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1answer
635 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 ...