I just hang around pretending I know something
I haven't tried it, but you can set the midi out to record to another instrument. This sometimes works and sometimes doesn't. I tried it with my S-keys piano and got a lot of gibberish mixed among the notes. But this seems to just be a basic arp engine, not something that adds pedal noises and stuff.The one real drawback to the engine is that there is no easy way to export its midi if you want to layer or replace with a different library.