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.

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277 views

JACK can't play ardour along with any other media

I recently downloaded Ardour2, and it appears that JACK cannot run Ardour along with any other media (Rhythmbox, YouTube, Pandora, etc.). The symptoms are as follows: If Ardour is the first thing I ...
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13 views

How can software that doesn't natively support JACK be made to work with it?

Audacity, for example, can be switched to JACK if needed. What about software that can't but can be switched to alsa?
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102 views

alsa sound module snd_aloop

I am having some trouble wrapping my head around the snd_aloop module. I am trying to route all my audio through alsa without using pulseaudio. If I start jackd there's not sound from non alsa apps ...
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241 views

pavucontrol: Connection to PulseAudio failed

After uninstalling JACK I lost my access to PulseAudio Volume Control. It says: I tried purging and reinstalling pulseaudio and pavucontrol and removing ~/.pulse-cookie and ~/.pulse. Also, I tried ...
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274 views

JACK issues on Lubuntu, any thoughts? “Driver is not running”

I am trying to set up JACK and Wine to run FL Studio on Lubuntu. Upon running qjackctl and attempting to start JACK, I get the following error. Any thoughts? I disabled JACK D-Bus and got fewer ...
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118 views

Configuring jackd (JACK daemon) with ALSA

I'm trying to wrap my head around ALSA config files and jackd, but I'm not getting anywhere, other than crashing my machine. The microphone is a USB type and specified in ALSA arecord as -D ...
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0answers
52 views

jackd and SuperCollider headless problem

I am trying to boot an RPi autonomously to start jackd, SuperCollider and then play a SuperCollider patch. Jack launches and Supercomputer starts to compile but then something goes wrong. The script ...
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21 views

Configuring a system to run PulseAudio automatically on top of JACK

This is essentially the same as the Ask Ubuntu question How to use JACK and Pulseaudio/ALSA at the same time on the same audio device?. However, the answers to that question are all incomplete in at ...
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0answers
45 views

Treat multiple sound input sources as one virtual microphone

I want to automate my home using Jasper. To do that, the documentation tells me to edit the ALSA config file so a usb card will have index 0. I want to use multiple microphones spread around my ...
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0answers
27 views

recordMyDesktop can't use jackd for audio

If I try to have recordMyDesktop (technically qt-recordMyDesktop) capture audio via jackd, when I hit record it immediately stops with the message: recordMyDesktop has exited with status: 4352 ...
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164 views

USB Audio detected by ALSA but not JACK?

I have a Presonus AudioBox USB device, connected to a USB 3 port, that supports both MIDI and Audio input. When I launch JACK and open the connection list from QJackCtl, I can see that the AudioBox ...
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287 views

USB MIDI keyboard (Oxygen 61) now not appearing in QJackCtl

I've had a USB Oxygen61 MIDI keyboard for awhile now, and it has worked fine in the past (maybe a month ago, last I tried). But now when I plug it in, it no longer shows up in aconnect -l, and I ...
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0answers
19 views

How to join the two input streams of a multidevice soundcard?

I have an old M-Audio Blackbox that consists of two sub-devices. If I open qjackctl those are advertised as hw:Box,0 and hw:Box,1. Up to now I readily switched between those configurations as needed, ...
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0answers
62 views

How can I stub out an audio interface in jack?

I've got a Tascam US-800 8-in/4-out audio interface that I use to record into Ardour. The setup is great, but I like to do my mastering and mixdowns elsewhere and I always have to drag around the ...
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0answers
40 views

Starting jackd after using other audio

I know this is probably a common question. When I start jackd after first booting, everything works fine. If I use another audio (such as Banshee or Youtube, etc) jack won't start. From what I ...
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28 views

Multiple sound errors when running Pyo

I just tried to install the python module with pyo following this method: http://ajaxsoundstudio.com/pyodoc/compiling.html it returned this error: pyo version 0.7.8 (uses single precision) ALSA lib ...
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54 views

espeak, alsa Unknown PCM

I have a Debian Wheezy and I connected to my linux a USB Dac. I use every time a MPD server (and that work) Now, I would like to use espeak with pyttsx But when I start my script (It worked and my ...
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21 views

Is it safe to retask other audio ports as lineins using Jack?

So, I wanted to setup my Linux PC to record multiple line in audio devices without putting holes in my wallet. Then I found a tool called hdajackretask which lets me convert any port into any other ...
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39 views

Can't start Jack as simple user

I'm trying for weeks to create an evoluted webradio based on Jack (Pulseaudio sucks for what we need). Jack is running well when I run it as root and jack_lsp is well returning what i'm looking for. ...
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318 views

No sound with audio jack

I am using a Debian wheezy on Netbook eeepc 1001px After last kernel update When I plug the audio jack, I can here the electric charge but no sound when I remove it the internal speaker works ...