I use JACK/qjackctl with the Calf Audio Plugins for a system-wide EQ. This means that I have to start and run these two programs in every session from beginning to end.
Adding them to the Startup Applications in Tweaks works. However, since these programs function like "set-and-forget" services, I would like to start them either minimized or on a different workspace.
In Compiz, the "Place Windows" plugin was able to put a specified window on another workspace in the background without switching to it, however this does not work anymore in 18.04.
There is a Gnome extension called "Auto Move Windows", which automatically puts application windows on a specific workspace, but adding these two programs does not work in the intended way, either because they start too early or because the destination workspace becomes the one the system starts up on, I am not sure.
Is there any way to start these two programs "out of the way", either with Startup Applications, some other setting or something like a startup script with certain parameters?