works fine, you can do just about everything while the sequencer is running untill it crashes
also some cool stuff the seq/arp clock is a mod source, u can record arp notes into a sequencer track, arp outputs on the midi out so u can hook up external gear. etc.. seq/arp is such a good feature with a lot of creative potential, not using this aspect of the e-mu is like not using the filters to me, composition changes everything its not just static sounds but how they are arranged, you can work very fast this way too!