It covers a range from 1ms to 16s for timing operation at 1ms resolution. It is 1/100th of a dB when mapped over the range of human hearing - far more resolution than one can perceive. The Arc, though really careful knob design clearly is an example.ġ4-bits, when needed, is more range than almost any musical parameter: It is almost exactly 1 cent of tuning if the control is mapped over the whole audible range. Larger knobs and longer faders can usually double the available precision - though that is really only one more bit! Encoders, on the other hand, by leveraging acceleration and multiple turns can, of course, often offer far more precision. This isn’t to say that there aren’t circumstances where finer control isn’t desired (like frequency settings) or achievable. So - the mechanics of the device generally preclude any useful precision beyond 7 bits (or close to it). An XY touch pad, while larger in both dimension than the typical fader, generally is highly limited by the pitch of the sensing technology and usually far less precise than 7 bits. Other common controls are similar or worse: Joysticks are just two potentiometers with even less angular range, hence less precisely positionable. (For audio taper mapping, you get more than 0.1dB accuracy in the top end.) Even if that range represents 80dB of reduction - it is still a precision of 0.6dB… which for volume setting is pretty much at the limit of audible differences in almost all circumstances. I also suspect the average linear taper pot isn’t all that much more precise.įor a medium travel fader - say 60mm, then you get a resolution of about ½mm - which seems more than one could expect for precise linear positioning over that distance. (I searched for studies, but all I could find were focused on strength not positional precision). I suspect in a small or medium knob this is probably a little less precise than you can control - but I bet not by much. In a typical 100kΩ pot, with 270° of rotation - this means you get a resolution of about 2.1°, (and 0.8kΩ). For pots and faders, this directly maps to physical distance, and for most purposes, this is close or as precise as you could hope given the devices and mechanics of hand control: Love the thread - and love me some nice, small, flexible MIDI controllers… where are they!!!įolks often ask for more than the 7-bit, 128 value resolution that a MIDI CC offers.
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