This cat is hanging out during a complex-rhythm improvisation with a Korg PSS-50 and an Alesis Midiverb. From acreil on YouTube via matrixsynth.

You can make unusual time signatures by switching between patterns.

Chord progression:
First part: F m7, B m6, D M7, G# 7, A# m9, E 6, G m6, C# 9
Second part: C# m7, C M7, E m7, G M7, G# m7, B M7, A# m7, F# M7, F m7, E M7, D# m7, A M7
Third part: F M7, A m7, A# M7, B m7, D M7, F# m7, D# M7, D m7, C# M7, C m7, G# M7, G m