Analog, search for tutorials for "Jeskola Buzz", that's the original that Aldrin, Buzztard and now Neil are cloning.
Also, there's a seperate manual for Buzz/Neil's most important plugin, Matilde Tracker, that you'll probably want to read. (MatildeTracker is the built-in sample tracker, works more or less like protracker)
edit: searched it for ya. here you go, bro.
http://avdl1064.oli.tudelft.nl/buzzmanual/ Jeskola Buzz Manual
http://www.buzzmachines.com/machines/do
newid=1006 -> download this, it contains some dlls and a couple of html files. you can throw away the dlls, just read the html for info about Matilde Tracker
edit2: remembering when i started to learn buzz, i remember there were a couple of traps/ things that are not realy obvious
1) to set the loop end in the sequencer click on a position after the position where you want to set the loop point, and press Ctrl-E
2) unlike generators, effects do not automatically produce their own tracks/patterns in the sequencer. But of course it's possible to control fx parameters over time. to create a fx track, right-click anywhere in the main sequencer window and select "Add Track" and then chose your desired fx plugin.
edit3: Vytautas/Bucket Brigade told me he's currently working on the program every day and he most definately appreciates bug reports.