The first optical sensor detects when a key has been pressed, and the second on is for measuring the velocity. the key then "bottoms out" on the first part of the stroke so you can feel it. you can then press down further to get "poly aftertouch" from the Force sensitive resistors under the main spring. It is not going to output "poly aftertouch" though each will be assigned a different MIDI CC, since it will be playing a custom DSP circuit it makes it more versatile, (each key could control something for that string, or all strings).
anyways, the main thing about this is that you can press the key through another 25mm or so after a note is played, so you can feel by the position what is going on, it is really hard to judge what you are doing with synth keyboard type aftertouch where you press down and do not really feel anything.
It will also be able to generate "pushes" on the string depending on how fast you are moving the key up or down, this will (hopefully) allow a controlled bowing of the string like a violin or other bowed instrument.
For people who dont know what this is all about. this is a "keyboard" but each key will "pluck" a guitar string electronically after you press a key there is additional movement to control the sound.
Hi
ReplyDeleteHope you get it to work soon.
For each key you have 2 optical sensors and one force sensitive resistors. Any idea how much that may cost to make each key?
Thank you in advance.
Do the optical sensors and force sensitive resistors come in kit form? Or you have to wire them up?
ReplyDeleteThanks
I had to decide which ones to buy and so on, the optical sensors are cheap, about $2 each from digikey but the FSR cost about $7 each but i bought them from boutique store(robotshop.ca), probably cheaper if you could find a proper distributor.
ReplyDeleteProbably not something you would want to build for a 61 note synthesizer keyboard :D
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