Re: [PATCH] gnu: Add gxtuner.

[Kei Kebreau <kei@openmailbox.org>]

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Ricardo Wurmus <rekado@elephly.net> writes:

> Kei Kebreau <kei@openmailbox.org> writes:
>
>> This package is reproducible and clears the linting process on my
>> end. Sadly I'm not skilled enough with JACK to check the functionality
>> of the package. :-/
>
> Using JACK on GuixSD effectively requires a little additional effort.  I
> have this in my system configuration to be able to use JACK’s realtime
> mode:
>
>   (users (list (user-account
>                 (name "rekado")
>                 (comment "rekado")
>                 (group "rekado")
>                 (supplementary-groups '(… "realtime"))
>                 (home-directory "/home/rekado"))))
>   (groups (cons* (user-group (name "rekado") (id 1000))
>                  (user-group (name "realtime"))
>                  %base-groups))
>   …
>   (services (cons* (pam-limits-service
>                     (list
>                      (pam-limits-entry "@realtime" 'both 'rtprio 99)
>                      (pam-limits-entry "@realtime" 'both 'memlock 'unlimited)))
>                    …))
>
> This means: add my user account to a new group “realtime” and then
> raise the realtime priority for this group.  Also drop memory
> restrictions for members of this group.
>
> Then you close all applications that might currently be using the audio
> interface directly.  Make sure pulseaudio is not running.  Then run the
> JACK daemon with the ALSA backend:
>
>     jackd -d alsa
>
> At this point you can start any application that needs JACK.  To connect
> wires between JACK applications and the audio interface ports I
> recommend using “patchage”, a graphical patcher that shows you all audio
> ports on all JACK appplications and lets you draw connections between
> them.
>
> Hope this helps!
>
> ~~ Ricardo

This definitely helps; thanks!

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