[sdiy] Fully assignable sequencer

[Dump Static]

I'm (slowly) working on a 16 step sequencer that uses the PSIM as a
brain.  My plans include:

 forward, backwards and pendulum modes
 skip switch per step
 hold (or rest) switch per step
 reset (or reverse direction) switch per step
 several "clock division" settings
 several gate length choices (16%, 33%, etc)
 1 x 16 sliders for (note) cv
 2 x 16 knobs for aux cv
 1 x 16 rotary knobs for "step length" (1/32, 1/16, 1/8, 1/4, 1/2, 1,
etc) like the Roland System 700 has
 16 selectable quatization note sets (courtesy of the PSIM!)
 clocked via DIN Sync

The PSIM will get the clock and feed the sequencer a cv for mux
purposes, provide the gate out and the quantitizing.  The best part is
that since the most important features are in the PSIM's program, it
will be easy to customize and add features.

Drew


>>> Dave Manley <dlmanley at sonic.net> 07/10/07 3:22 PM >>>
The Niessen is using rotary *encoders*, so there's not much in the way 
of wiring. I wouldn't want to try it with rotary switches unless they 
were pcb mounted.  For quantized voltages to supply to the switches, it 
would be easy to design a resistive divider/current source like those 
used in old analog cv based keyboards to generate the inputs to the 
switches, and then use an analog mux to generate the cv out.  The 
mux/control logic could be similar to any number of old sequencer 
designs.  A cross-bred keyboard/sequencer.  Hmmm...maybe not such a bad 
idea...

-Dave

Scott wrote:
> Those rotary switches are a great idea, but looks like it would be a
LOT
> of work to wire up.  Has there been discussion here about how to do
> something like that?
> The surplus store in town had a box of little 12x1 rotary switches
last
> time I was there.. hmm.....
> 
> -----Original Message-----
> Subject: Re: [sdiy] Fully assignable sequencer
> 
> And to be honest: the only commercial available HW sequencer which 
> produces real usable CVs for oscillator pitch in classic tonal music
is 
> the Niessen SAM-16. No pots but switches..

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