Since we are talking about expansion modules for the A-152, I thought I would put a suggestion for achieving something similar with the A-154. I think a good and inexpensive expansion module for the A-154 would be a small panel with 8 jacks that a stand alone A-154 would plug into, that would provide 16 sequentially addressed gate outs controlled by the A-154. Basically a gate sequencer instead of the standard A-155. It would be nice if the module had a header to accept the ribbon from the A-154 and also have a “pass-through) header allowing the connection to more than one module to run in parallel.

I have always loved the idea of a “modular” sequencer with all the functions of a classic sequencer broken out into separate modules that could be combined to make a custom sequencer of your own design. With the A-154 as the “brain” of the system, you could have expansion modules like this gate out module I just described, a small panel with pots for the CV generating part (that could be chained for more rows), a 16-position sequential switch module, and other modules that would connect up. This way you could design a “sequencer” with as many rows of CV out, Gate outs, Trigger outs, or whatever you wanted. It could be as big or small as you wanted.

I started to make a system like this with my PGM-4X4 series which can be stacked as high as you have cabinet space. in programmer mode, it can address its columns using a internal, very basic, sequencer or manually or via external gates. I currently run two of them with the outputs from a A-152 but the A-154 would be a MUCH better controller since it provides clock outs too.

I asked Dieter a long time ago about accessing the header on the A-152 and was given the pinout (Thanks Mr.D) which when buffered for protection reasons, can provide a trigger when the A-152 changes stages. This makes the A-152 a much easier module to use when using the CV stage address method. If a add-on expansion module was made for the A-152, adding this trigger out would be a BIG plus for me.

-James

James Husted, Designer, Synthwerks LLC • www.synthwerks.com • james@... • info@...