Circuitbenders Forum

Please login or register.

Login with username, password and session length
Advanced search  

News:

Author Topic: adding real keys to a korg monotron ribbon keyboard...  (Read 4319 times)

jamiewoody

  • This person is dangerously insane.
  • *******
  • Karma: 8
  • Offline Offline
  • Posts: 643
adding real keys to a korg monotron ribbon keyboard...
« on: June 11, 2011, 02:15:26 PM »

how should i go about this? i do not want to ruin it...

is there a common to tie (real) key grounds to? do i just stick a wire under the right pitches under ribbon and tie to the positive terminal of keys?

i can find NOWHERE online where someone has done this yet...
Logged
"gravity...it's what's for dinner!"

Dylan

  • Closer to the meat
  • *****
  • Karma: 15
  • Offline Offline
  • Posts: 287
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #1 on: June 11, 2011, 07:11:40 PM »

I'm not sure, but you may want to contact Collin Cunningham

SX-150 button mod
Logged
www.palmetronics.com
BitCoin accepted.

jamiewoody

  • This person is dangerously insane.
  • *******
  • Karma: 8
  • Offline Offline
  • Posts: 643
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #2 on: June 12, 2011, 12:59:12 AM »

?
Logged
"gravity...it's what's for dinner!"

Dylan

  • Closer to the meat
  • *****
  • Karma: 15
  • Offline Offline
  • Posts: 287
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #3 on: June 12, 2011, 03:02:29 AM »

Ack, for some reason I thought you were talking about that gadget. My bad.
Logged
www.palmetronics.com
BitCoin accepted.

tbone

  • Newbie
  • *
  • Karma: 1
  • Offline Offline
  • Posts: 19
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #4 on: June 12, 2011, 06:17:27 PM »

http://blog.makezine.com/archive/2008/12/how-to-sx150-button-mod.html

it may be a different device but the principle is the same.
simple combination of buttons and resistors. give it a try.
Logged

jamiewoody

  • This person is dangerously insane.
  • *******
  • Karma: 8
  • Offline Offline
  • Posts: 643
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #5 on: June 13, 2011, 01:50:03 PM »

i sort of understand the deal with the resistor ladder. but, how does that apply here> i mean, if the pitch points are already established in the ribbon, should'nt i just be able to hook up the keys?
Logged
"gravity...it's what's for dinner!"

tbone

  • Newbie
  • *
  • Karma: 1
  • Offline Offline
  • Posts: 19
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #6 on: June 13, 2011, 05:07:36 PM »

so do you mean more of a mechanical solution pressing the ribbon down in the right place as opposed to an electrical solution?
Logged

SynthularModulus

  • Newbie
  • *
  • Karma: 0
  • Offline Offline
  • Posts: 17
Re: adding real keys to a korg monotron ribbon keyboard...
« Reply #7 on: December 13, 2019, 08:47:28 PM »

On the Monotron the ribbon is simply a variable resistor. Thats why you can get non-chromatic pitches on it. On the DUO, it has a quantizer that achieves the pitch quantization, but again, the ribbon itself is just a variable resistor. So what the Monotron is looking for to control its pitch is a resistance on the ribbon controller. So if you wanted to use bottons or keys, those keys need to switch between different sets of resistors to provide the monotron with different resistances.

A much simpler solution (though perhaps it's "cheating" from a circuit bender's perspective,) would be to just use the CV pitch point on the monotron, and feed it a CV from a keyboard or controller that has a CV out. For example, a Roland A-01k, or if you have a Arturia BeatStep Pro, you can send it midi from a midi keyboard, the BSP will convert that midi to CV, and then it is a very simple modification to the Monotron to give it a CV in jack.

Having CV ins on Monotrons is a beautiful thing. If you have any CV gear such as Eurorack stuff, Korg SQ-1, Roland A-01k, BeatStep Pro, etc., you can really open up the possibilities of the Monotron, with the simple CV-on modifications that can be done.
Logged