Dave Smith Instruments SYNTHESIZERS

I just picked up a used MEK and I've been playing with the arpeggiator.
Has anyone else noticed that when the arp is on that the MEK responds
on all midi channels, regardless of what the global midi channel is?

Simple setup: drum machine (xmits on ch. 10)as the master midi clock
-> MEK (ext clock, recvs on ch. 1). When the arp is on (not latched),
the MEK plays the midi output of the drum machine., when the arp is
off, it doesn't.

jmw