- Alex Koo/Mark Turner/Ralph Alessi : acoustic chamber trio project consisting of piano (Alex Koo), tenor saxophone (Mark Turner) and trumpet (Ralph Alessi)
- Alex Koo Trio: My piano trio, combining both avant garde improvisation with key elements of the jazz tradition, together with Dré Pallemaerts (drums) and Lennart Heyndels (double bass)
- i.f.o (Identified Flying Object): improv duo (piano/keys/electronics) with drummer Attila Gyarfas (drums/electronics)