I have a relative who I helped set up RTLinux (?) on Kubuntu back in 2018. I think they were playing around with Helm, Calf, Ardour, Hydrogen, Rosegarden et all and JACK of course, but that’s all I remember on the music production side - I was helping more along the lines of PPAs, compiling and configuring and mostly on WE after I came back from somewhere, so 3AM or smth (not good for memory).
Horror writing prompt