Thanks, I'd found that already... it's slightly better than no documentation. :-)  But I'll take what I can get.  It's a little rough going at first when it kind of assumes you're aware of a big picture that, in my case, I was almost totally unaware of.  As you slowly figure it out, and the bigger picture of how all the pieces fit together -- sequencer ports, clients, channels, and how they're named and accessed and what's what, the docs become a little clearer. Helps to understand it before you read it, heh.