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
43 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
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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2answers
111 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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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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0answers
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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0answers
120 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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0answers
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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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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1answer
105 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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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
31 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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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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0answers
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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0answers
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
280 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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0answers
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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0answers
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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0answers
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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82 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 ...
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1answer
284 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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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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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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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 ...
2
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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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1answer
985 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 ...
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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 ...
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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 ...
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1answer
298 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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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 ...
4
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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, ...
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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 ...
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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 ...
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0answers
905 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
votes
1answer
849 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 ...
0
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1answer
581 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
223 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
571 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
381 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
819 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
8k 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 ...
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1answer
261 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 ...
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 ...