Another vote for Zynthian, this is essentially the next generation of synthesizer platform, it has all the right elements .. And see also, monome (https://mono

Another vote for Zynthian, this is essentially the next generation of synthesizer platform, it has all the right elements .. And see also, monome (https://monome.org/ https://monome.org/) .. as yet another such example. Just to point out how flourishing the Linux-based DAW sub-culture really is.