Hollo,
Some people were looking for some accessible multi-track recorder for Linux.
I just spotted an app under Debian named traverso. At first glance its
interface feels pretty accessible. I don't know if Nikolas is checking other
Linux distribution but it may be that you'd like to check it out. I couldn't
find it in Slint yet with spi -s traverso command.
Hth,
Pawel