Uncle Dave,
I completely understand how to add effects at the end in the final mix.. When I do my recording I turn the "voice set" off... I don't see how you can set a DSP effect to the drum tracks that were recorded under they style sequencer..... This is what puzzles me. That's why I use XG works for making drum tracks... The program allows so much more than what the 550's sequencer offers... Actaully this is one thing I miss about the Casio MZ-2000.. Granted it was no Yamaha, but Damn! It had a really nice song and style sequencer. None of the PSR models below from the 740 down had the sequencing power of the MZ......

Squeak