You can with the MC303, alright they may not be the best but play with running midi from your keyboard into an arpegiator in Cubase/Logic etc then back out into the 303 then back into your desk or whatever, cant rememebr then name of the arpegiator/plugin built into cubase (SX2) but its fully programmable and if you find the right sample on the box from the outset you can have a lot of fun...