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killertofus/Guitarix arch

Created June 13, 2025 04:22
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Guitarix arch
[[Category:Sound]]
{{Related articles start}}
{{Related|Professional_audio}}
{{Related|Sound system}}
{{Related|JACK}}
{{Related|Realtime kernel}}
{{Related|envy24control}}
{{Related articles end}}
== Installation ==
Guitarix interacts with JACK to provide real-time, low-latency audio. For pipewire users, there is a pipewire implementation called pipewire-jack. We will use qpwgraph to create the correct audio routing, i.e. from the audio interface to Guitarix and from Guitarix to the speakers.
Cinnamon can be [[install]]ed with the package {{Pkg|guitarix}} {{Pkg|pipewire-jack}} {{Pkg|qpwgraph}}.
== Groups ==
To ensure we have least latency for the user running guitarix we need to add them to the following [[user group]]:
realtime
audio
== Latency ==
To reduce the audio latency we want to set the required node.latency in pipewire-jack. To do this, we first copy the sample file to the user’s config:
$ cp /usr/share/pipewire/jack.conf ~/.config/pipewire/jack.conf
Then we change the node.latency value to 128/48000 by uncommenting and modifying the line.
== Ulimit ==
Finally, make sure that your ulimit -l value is set to unlimited. If not, you’ll see an error like system init *** mlockall failed . If your ulimit value is not unlimited, you can create an exception rule by creating the file /etc/security/limits.d/audio.conf with content:
@audio - rtprio 95
@audio - rtprio 95
== QPWGraph ==
In qpwgraph make sure you pipe the output of your audio interface to the input of guitarix and the output of guitarix to the input of your speakers.
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