If you want to venture into the FOSS DAW realm on Linux you have to go to LMMS and Ardour. I've played around with them, they're a little bare-bones, but they do work. Issue is I haven't been able to use them properly, because I just can't stand to look at them, they are afflicted with the medium-size open-source project curse of looking particularly horrid. I hope this isn't taken as an affront to any of the developers behind these projects, a DAW is a hard task, but I keep asking myself, out of the set of developers who work on these projects, is there really no one who feels the same way as me? Am I just afflicted with some weird pixel-peeping autism-esque disorder that makes me stare at the constantly-reocurring-throughout-all-FOSS-applications clump of jarringly gradient-ed grey buttons with white icons on them, their round corners contrasting with each other because they're clearly placed way too close together than they were meant to be? (I swear I see this in every mid-scale project using QT and older GTK!)
And I also need to confirm, this isn't just a "slight annoyance" for me, I have genuine issues when I have to concentrate on a project within some application that is suffering from the FOSS UI affliction, my mind wanders to looking at those buttons again, or those #00FF00 greens, or at some label that has clearly seeped a few pixels downwards out-of-alignment with the button it was placed in...
Ugh, I know I have some issues for sure, but I know someone else has to care about this too? It's the main reason why I fail at using non-textual FOSS software, and have to resort to Logic Pro or Ableton!
Sorry for the rant, I had to get it out of me. I wish I had more time in a day, then perhaps I could go to these projects and help out with UI, but I have a feeling my proposals will be rejected, even if I had the time to make them, I have found most FOSS developers are quite happy with how their UI usually looks like, including many people here on this forum.