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How do I play audio though jackd from console?

OSS | play ALSA | aplay PulseAudio | paplay JACK | ? What tool can I use to test if jackd is properly configured and make it play something?
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208 views

How to tell system wich USB-soundcard I want to have hw:2, if the two are “snd_usb_audio”?

I have a USB-soundcard (Encore ENMAB-8CM) and a Webcam with mic (Logitec c170). I want to use Jack with the USB-soundcard and, using alsa_in and jack_connect via scripts, to connect Webcam mic to Jack....
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1answer
158 views

No audio output after starting qtractor in Fedora 20

I have installed qtractor to start experimenting with music composition/production. However, after starting the application, the computer seems to redirect its audio output and the other applications ...
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1answer
90 views

How to track some periodic system activity which hinders realtime performance

I'm running Jack2 with Pianoteq-5 on two core laptop running 64bit ubuntu-14.04. Such configurations are very sensitive to realtime performance because of low-latency requirements. At first I heard ...
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1answer
778 views

Using sox low pass filter with jack

How do I run sox with jack so that sox takes the input from jack, does something (in my case, a low pass filter) and outputs the processed stream to jack. sox foo.wav bar.wav lowp 1000.0 Will take ...
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1answer
656 views

Simulating audio playback on headless linux server

We have a headless linux server (Debian 5) we use for running integration tests of our web-page code. Among these tests are ones implemented using Selenium, which practically simulates a user browsing ...
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1answer
1k views

Running Jackd on Ubuntu for my External Firewire Sound card

I'm running Ubuntu 10.04 and I have an external Sound card: Phonic Firefly 302. I've connected the device, installed Jackd, added the lines: @audio - rtprio 99 @audio - memlock 500000 @audio - ...
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1answer
250 views

Compile and Install qtjackctl on Mac OS X

Is it possible to compile and install qjackctl on Mac OS X? If so how do you? EDIT: When I try to install it it does this: http://paste.pocoo.org/raw/G9610d6NviAZQ7nnZCwQ/ any ideas as to why?
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1answer
886 views

Easy to install JACK GUI for Mac OS X

Does anyone know of an easy to install GUI for JACK on Mac OS X?
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2answers
1k views

Moc in mac show error message

I install moc with port, but when try launche I get this error message. $mocp Running the server... Trying JACK... FATAL_ERROR: No valid sound driver FATAL_ERROR: Server exited any idea ? Many ...