I use a little Akai LPK25 keyboard (fits perfectly right above my computer keyboard, so I just reach up a little to play) with seq24 for editing/recording MIDI notes and zynaddsubfx as a synthesizer on Linux. It's a straightforward, simple, and clean setup. Notes in seq24 are displayed in piano-roll format, and you can compose looping patterns that you can then combine into song patterns. I'll also use an electric gu…
Two octaves (actually almost three) I could easily get on computer keyboard (not that convenient, I know), so it doesn't look that useful to me, also because 2 octaves are not enough for most of two-hand plays.
So Renoise has computer keyboard as music keyboard mode? Good to know. I'll have to check it whether it works as I would like it too.