Hi John, the "digital outputs" section of the A-152 can be used with a
 mixer to create an 8 stage sequencer (just like you would with the
 A-161 or A-149-2). You can increment the step using the 152 clock
 input. You can also use the cv input to make the steps go backward, or
 forward, or completely random.
 > And wouldn't there also need to be some other
 > stepped source to provide the 4 modal changes
The A-152 is doing the four modal changes. The A-160/1 does the faster
 8 step repeating part.
 Doug