Doepfer’s A-151 module is essentially a quad-position rotary switch. The module sports four ins and outs, trigger and reset inputs, and a common in/out. After reaching the fourth in/out the trigger loops back to the beginning, making this module a great way to add rhythmic shifts and variations to any patch.
Cascading outputs switched with a trigger input
The first input/output will jump to the second with a trigger input with the Common input/output as its corresponding input or output
Patching an Input into the Common I/O turns the other four into Outputs
Patching inputs into the 1-4 I/O's will give its output out of the Common I/O