[sdiy] DOTCOM Analog Sequencer.. next project startup..

Chromatest J. Pantsmaker chromatest at azburners.org
Fri Jul 24 03:00:03 CEST 2020


If you're going to go with a rotary encoder, why not use a single one with
N-number of buttons, one per step.  You could get a really high quality
encoder for less than 16 decent analog pots.

Hold the button down, a display shows what note is programmed there, and
turning the encoder adjusts that note.

Your firmware could allow multiple notes to be adjusted at once even.

On Thu, Jul 23, 2020 at 5:09 PM Jean-Pierre Desrochers <jpdesroc at oricom.ca>

> I'm starting to think about my next DOTCOM analog module:
> a 16 steps sequencer (maybe 32 steps).
> So far I'd have 2 choices for the final number of steps CV adjustments.
> - Standard CV pots sequenced with gates
>   pros: cost is cheap, the note value is physicaly kept by each pots
>   cons: bad note precision on large span (I'd like a 61 notes span on each
> CV adj),
>               span must be kept not too large..
> - Rotary encoders
>   pros: Very large CV span can be achieved on each steps (beyond 61
> notes),
>              quantization easy to be achieved on each steps adjustments.
>   cons: expensive (are they all ?), need for data memory to keep every note
> values (micro-processor needed)
> All the gates could be generated by the same micro or
> from a precise adjustable master clock
> What do you think from your past experiences ?
> Jean-Pierre
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