13 EDO improvisation
13-EDO is not an easy tuning to work with on a standard keyboard, but an isomorphic keyboard layout makes it a bit easier. Here I'm using an arrangement of keys that would be classified as a 1/5 keyboard according to Erv Wilson's terminology. This arrangement has an interesting 9-note basic scale that's useful for melodic improvisation, although the harmonies are still awkward to work with.