I start with MAO and I would like to use the server Jack.
I am under Ubuntu 18.04.
Currently Audacity works very well without Jack but as a curiosity I would like to try to see how we operate. To do this, I installed:
qjackctl and jaccd.
When I open Audacity in Preferences / Devices we see the host ALSA (and I can not find the jackd) screenshot below:
In the documentation, it is specified to ‘arm’ Audacity then to pause / record it so that jack connects to Audio Port?
How can I do ? I miss libraries or other packages to install.
You need to start the Jack server before launching Audacity.
The easiest way to start the Jack server, is to launch QjackCtl, and click the “Start” button. Ensure that Jack is running without “xruns”. If Jack fails to run, or you get continuous xruns, you will need to adjust the Jack settings (in QjackCtl) until you find settings that enable Jack to run reliably without xruns.
The most common problem when using Jack, is getting Jack to run with the selected device without xruns. Unfortunately, that’s something that we are not able to offer much help with as the settings vary from machine to machine. If Jack is not running reliably, or if there are any problems with Jack Audio System, you need to fix those problems first. Don’t bother even trying to use Audacity with Jack until you have the jack server running reliably.
Once Jack is running correctly, then using Audacity with jack is very simple. All you need to do is:
By default, the recording input and outputs in the Device Toolbar are set to “system”. The “system” input / outputs correspond to the inputs / outputs of the audio device that you configured when setting up Jack.