JACK Audio Connection Kit (or JACK; a recursive acronym) is a professional sound server daemon that provides real-time, low latency connections for both audio and MIDI data between applications that implement its API.
Questions tagged [jack]
105 questions
40
votes
4 answers
Jack vs Pulseaudio -- how is it faster?
I see a bunch of claims that Jack is faster than Pulse and has less latency. How is that so? Why does Pulse call itself lightweight, and the Jack guys call it fat? Could anyone break down the internals of these two daemons to a layman?
Evan Carroll
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18
votes
3 answers
Headphones with combo jack: Force internal mic for input and headphones for output
Linux systems have been having a historical (>5 yrs) problem in configuring audio devices especially commonplace headphones with combo jacks.
Since many people want to use their favorite linux systems for video chatting, there are records of…
user210872
14
votes
2 answers
What are XRuns?
I have read about them several times and encounter them myself when setting the buffer size too low in jack or quitting audio applications. Nobody ever explains though what XRuns are. Can someone clarify and give a definition for XRun? What it is…
TomTom
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13
votes
2 answers
How to prevent white noise in headphones on Dell XPS 13 9350/9360
Every time time I connect headphones to the 3.5mm audio jack on my Dell XPS 13, I hear continuous white noise in addition to the audio I expect to hear. It's much louder than the typical noise floor for a headphone jack.
I've found many other…
Henri Koski
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8
votes
1 answer
How to restart Alsa/PulseAudio after using Jack
After I use Jack, the PulseAudio outputs and inputs are replaced by a dummy device. I've tried to kill PulseAudio and reload Alsa, but the only way I can use an Alsa-based application again is to reboot. I know that there must be a way to fix the…
bntser
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8
votes
1 answer
Using a Bluetooth speaker as output for JACK audio connection kit
I want to know if it is possible, to use a Bluetooth Audio Device (mine is a AMP from SURE electronics) as a output for JACK.
Currently i am only aware of the pulseaudio-bluetooth module and the possibility to run pulseaudio in combination with…
noreabu
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7
votes
1 answer
Linux sound: how does it work and why do I need to chain 3 architectures to use JACK?
Linux newbie: How do I use Jack? How does Linux sound work?
I have an app that is trying to output sound through ALSA or JACK, but I am not hearing anything.
Here are a couple of articles, from which I learned that ALSA is the kernel-mode sound…
Vorac
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7
votes
1 answer
How do I use Jack? How does Linux sound work?
I am trying to set up Jack, as I've heard it's the Linux equivalent to ASIO on Windows. I play guitar for fun and thought it would be cool to play with Ardour or find a FOSS equivalent to Guitar Rig.
However I do not understand... well, anything. I…
leo-the-manic
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7
votes
1 answer
Can someone diagnose this JACK error message?
OK. I start JACK without starting the JACK server. I get:
23:09:22.730 Patchbay deactivated.
23:09:22.765 Statistics reset.
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or…
ixtmixilix
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6
votes
1 answer
alsamixer / pulseaudio choose internal mic over mic jack
I have laptops running Debian stretch / pulseaudio version 10.0-1 on which I'd like to choose the internal microphone over the mic jack.
When I plug my headphone which includes a microphone through the jack, only the microphone of the headset works…
FlogFR
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5
votes
2 answers
Alsa & JACK - card and device names (different naming conventions)
I am a bit confused about audio device names. If I use command aplay -l I get the list of all audio devices on my system:
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
…
71GA
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5
votes
1 answer
Simple way to connect midi keyboard to pulseaudio without using Jack
I need a simple way to connect the midi keyboard to pulse audio and leave it active. ( i'm not worried about low latency.)
So far, I've looked at Ted's Linux MIDI Guide and followed all of that, but I reverted to normal latency kernel, when the…
listenlight
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5
votes
1 answer
Print and connect Jack Audio and MIDI ports from the command line
How do I print and connect jack-audio and midi ports from the command line, similar to aconnect -io or aconnect 20:0 132:1 for inputs and outputs of ALSA MIDI?
nath
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4
votes
1 answer
Docker with real-time / low-latency audio? (for virtual amps like Guitarix...)
I've been trying to get a foss virtual guitar amp to run on my Fedora machine for a while now, Guitarix (which runs on JACK) to be more precise. But I just can't figure it out. People say that it is very straight forward to get it to work by using…
Forivin
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4
votes
2 answers
Live noise cancellation of microphone audio with JACK, ALSA, Audacity?
Audacity has a very nice noise cancellation filter. Is it possible, using JACK with ALSA, to pipe live audio through Audacity's noise cancellation filter?
Geremia
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