Sorry, I where thinking more as a consept to improve the problem of low resolution when using small knobs.KSS wrote: ↑Sat Jan 25, 2020 4:11 pmThat would then be simply more bits of the EK-7 setup. Where there are 16 coarse ranges subdivided into 16 fine steps. 256 is not 'stepless', but consider the Sequential Prophet 5 only used 127.
In the EK-7 notes, John S also talks about other arrangements to deal with the eternal preset vs pot shaft position. EK-7 uses pots, not encoders.
My idea would involve building digital controllable voltage references using modern lowcost MCU and a 12 or 16bit dac. A rotary encoder to quickly do coarse adjustment, then press rotary encoder a number of times to select resolution from 100mV, 10mV and 1mV.
From my reading back when I were building a control surface my understanding are that many are of the opinion a pot using standard 320 degree wiper travel combined with a typical 18mm knob can approx 10 bit resolution (1024 steps) on a good day. No idea what bit resolution to expect from 5 or 7cm knob size, but clearly it becomes much easier to find sweet spots in the analog domain.