Smoothing inputs from MIDI controllers

#1

What is the best way to smooth inputs from standard 7-bit (0-127) MIDI cc's? I have been experimenting with the existing smooth math object and slew. I only use it on parameters where it really matters though- pitch and filter frequency. It works but there's still some wobble, as opposed to outright stepping.

I guess for alternate approaches I could get a BCR2000 and st it up for 14 bit.

Soldering pots is really not what i wanna do, but I guess it's another option. Albeit one that would result in buying a backup core.

#2

There are a few objects to help with this. The simplest of high pass filter will help you.

Type "smooth" into the new object filter and you may find the one I'm thinking of but can't remember for sure.

#3

Smooth and Glide both work, but smooth works a little better. Some community objects auto interpolate k-rate signals, which is pretty cool.

#4

this is a 'double edged sword' ... interpolation/smoothing is not free, it costs cpu, which is a scarce resource on the STM32F4, so I prefer to put it in explicitly when required. (of course the exception is where its essential to the function e.g. a vca ), e.g from a cc input, to a particular parameter on an object, sometimes that smoothed outlet can then also go to multiple inlets/objects.

I guess the 'ideal' option, would be an attribute which would enable/disable interp/smoothing code at compile time but this would have to be per parameter/inlet , which would clutter the object interface quite quickly.

its these kind of thing, where perhaps in some places, the factory looks 'low level' rather than end-user friendly, but the advantage is that you can spend your cpu cycles where you need them.

( you can of course create your own subpatches to create smooth/interp versions which you find yourself using repeatedly)