Using FSRs to generate MIDI note information?

#1

I’m in the process of making an enclosure with controls for my Axo, as part of which I’m looking to use some of these little guys:

Screen Shot 2019-08-05 at 20.36.47.jpg862x734 56.6 KB

to create essentially a one-octave MIDI keyboard.

I haven’t got very far with connecting up those parts of the patch yet…. :joy:

Screen Shot 2019-08-05 at 20.21.47.png1090x446 21.5 KB

I’m imagining (based on a hazily-remembered Arduino experiment) that what I need to do is give the Axo the following instructions:

  • As soon as there’s a change in PA0, start measuring the values from that input
  • After ‘X’ milliseconds stop measuring
  • Take the highest value obtained and use that to determine the velocity of the MIDI note
  • At the same time, trigger the MIDI note
  • Do not allow the note to be triggered again until after the value of PA0 has returned to Zero.

Can anyone who's used FSRs advise...is there a way to do this with the existing Axo objects, or should I create one? Or, is there a better solution which I’ve overlooked?

#2

if all you want is a "button" from those fsr's then maybe it is a bit overkill to use those. i would rather hook the analog output to the volume for example to control that dynamically. note on and note off can be obtained with a > c and and a < c object, with the note off lower then the note on.

#3

Brilliant, thanks @lokki! I'll give that a try. :smiley:

#4

yeah give it a shot. note that i had to use a lookup table aoproach for my fsr midi controller (arduino based) since the fsr's are far from linear