Execute script after Cadence starts JACK? (SImilar to QjackCtl?)

[arifd]

So for some reason when I start JACK from Cadence, My PulseAudio apps stop working until I run this command:

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pactl set-default-sink jack_out && pactl set-default-source jack_in

QjackCtl has the ability to run scripts before/after starting JACK etc. If I can run that, everything would be good. Don't want to have to do it manually every time.

Edit: Look at this... kinda strange: Gonna reboot and see what's up.
p.s. what does playback mode only do? (I'd assume it would make only PulseAudio output (can never remember if that is sink or source) available, but with that enabled, I still see both sink and source options in the JACK connection bay.

[LAM]

I prefer to use Qjackctl over Cadence.
Also, I prefer not to use ALSA midi, so i'm exporting ALSA ports with a2j and then stop it on shutdown.

This is the command I put in Qjackctl settings after jack start:

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pactl load-module module-jack-sink channels=2; pactl load-module module-jack-source channels=2; pacmd set-default-sink jack_out; a2jmidid -e &

and this is before shutdown:

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a2j_control --stop; a2j_control --exit

Never had any problems after that.

[arifd]

Thanks LAM, yeah I think I'm going to prefer QjackCtl also.

If i apt install QjackCtl, will it pull in JACK etc automatically? what's the apt command to have a proper install of QJackCtl, and JACK2?

I get a weird bug where JACK just becomes silent randomly, and it has something connected with the cadence 'switch master' button.

Also, look. started Jack, no PulseAudio now broken, and Cadence now tells me 'PulseAudio is started and bridged to JACK' (no it's not).

[LAM]

What's your distro?

On Debian:

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sudo apt install qjackctl jackd2

[arifd]

I'm working in Lubuntu, so yeah debian based. Thanks for the swift response!!

[arifd]

Hi @LAM, I'm working on a setup script that will set everything up (including other performance tweaks) from a fresh lubuntu installation. Will share when ready

I need to get commandline access to the qjackctl configuration so that I can add commands from the commandline into qjackctl.

There is a ~/.config/rncbc.org/QjackCtl.cofnf that has what I need...

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PostShutdownScript=false
PostShutdownScriptShell=
PostStartupScript=false
PostStartupScriptShell=

etc

But it's not persistent/gets rewritten every time the app opens... why!?

Here's what https://qjackctl.sourceforge.io/ says about it:

QjackCtl holds its settings and configuration state per user, in a file located as $HOME/.config/rncbc.org/QjackCtl.conf. Normally, there's no need to edit this file, as it is recreated and rewritten everytime qjackctl is run

[LAM]

It is rewritten every time, but if you modify the file when is not running it should retain your changes.

[arifd]

oh stupid me, yeah, that worked