Sequential Router

This module was designed in order to create complex and intricated sequences out of three basic sequences provided by one or more external sequencers.
As a matter of fact, it is a kind of sequential (maximum six steps) multiplexer that makes it possible to route three analogue inputs to two different outputs.
For each step, a rotary switch offers nine possible routes (numbers are for inputs and letters for outputs, A2-B1 reads output A receives input 2 and output B receives input 1): A1-B1, A1-B2, A1-B3, A2-B1, A2-B2, A2-B3, A3-B1, A3-B2 and A3-B3. For the STEPs #2 to #6 the first position of the rotaries is the sequence RESET function.
Strictly speaking this offers more than 531.441 possible combinations !
The steps are shifted either using a push button or by an external GATE signal. The routing sequence is reset to start position using a RESET push button or by an external signal. Yellow LEDs indicate which STEP is active.

Note that it can be used also for sequencing-multiplexing three audio sources to two audio channels!

NOTE: I have limited the circuit to 6 steps because of a 2U panel was too small for 8 rotary switches and jacks. However, the same PCB and components can be used to extend it to 8 steps. Read the notes on the schematics and see the different component layout versions. You will have to design your own front panel for the 8 steps version, though.