Analog Sequencer Design

[stewpye]

I'm designing an analog sequencer loosely based on the operation of the Moog 960 sequencer, and would apreciate opinons on a few aspects, as I haven't used an analog sequencer for about 15 years...

What I've already decided on is...
Two CV rows that can be switched between quantized and not quantized.
On/Off, Skip, Reset, Stop per step.

Please express your opinions on the following:

1. No built in clock. I'd prefer to use a drum machine or MIDI anyway...

2. Switchable glide per step, or perhaps another row of pots for adjustable glide. Is it worth the cost / panel space?

3. Third row of pots would be for gate length. Is it worth the cost / panel space? This could be optional anyway...

As the design is based on a microcontroller there are many more features, one of which is at least 8 pattern memories that can be accessed in pattern play mode.

I plan to sell PCB's for this if it all works out OK.

Regards,
Stewart.

[andrewF]

I have never built a seq with a built-in clock, but seeing as yours will be micro based, whynot implement one that can be set at a specific bpm - perhaps a rotary encoder, the xoxbox has something like this.

pots to set glide per step = awesome, I would love it and if i ever do another sequencer it will have this feature

Cv control of stage is always a good function.

[stewpye]

[Dougster]

Which microcontroller are you planning to use? If you've got enough capacity in the mcu, you could use encoders instead of potentiometers and store the state of each parameter. That way, when switching between modes, you won't have to worry about whether the potentiometer position matches the current state...

Regards,
Doug

[stewpye]