The Official Sequential/DSI Forum

Anyone good with midi box/hardware building?

cbx

  • **
  • 145
Anyone good with midi box/hardware building?
« on: May 21, 2017, 05:05:13 AM »
I want to build a project but my eye sight prohibits me from seeing the board. What I want is a midi box that has 16 knobs and 16 on/off switches with a 4-way toggle. This would be used to control a mopho sequencer similar to how a korg sq-1 works. The knobs control the pitch and the on/off switch is a quick way to hit rest/reset. The four way toggle selects sequencer bank 1-4.

It should be possible with midibox but I don't know if I can solder it.


cbx

  • **
  • 145
Re: Anyone good with midi box/hardware building?
« Reply #1 on: May 21, 2017, 05:29:21 AM »
The problem is also etching a circuit board.

I am thinking of getting one of these and writing some python scripts to use it although I really wish I had the one I want built.

http://www.akaipro.com/kb/article/2032#change

Gerry Havinga

  • ***
  • 351
  • Really enjoying creating sounds and composing.
    • For the love of electronic music
Re: Anyone good with midi box/hardware building?
« Reply #2 on: June 03, 2017, 08:11:16 AM »
Interesting, I am in the process of designing a 16 step 4 channel MIDI step sequencer. A device which can help you sequence in the way they used step sequencing in the 70's/80's Klaus Schulze style.

I am using a Raspberry Pi plus Arduino board and have a working very early prototype model with one channel and 4 steps, currently MIDI note on/off only. I am writing the software for the Raspberry Pi in Python 3.x, using one of Python's MIDI libraries. Currently I have started moving the software to a multiprocessing / tasking stage with message handling queueing so I can start focusing on tightening and better control the timing of the sequencer loop. The Arduino is handling the rotary encoder inputs at the front panel and communicates what is selected to the Raspberry Pi over USB (and provides power).

The idea is to create immediacy in the user interface: knobs, buttons and LEDs and a small LCD/OLED display. I really want to get away from the ubiquitous computer interfaces - just something that shows you immediately what is going on and gives you complete control.

From my perspective, obviously, the software will be Open Source / Free Software. Those who know me, who understand my passion for Free Open Source Software, won't expect anything else ;-). Perhaps in a year or so we will make a hardware product out of it, or some kind of self assembly kit, who knows.
« Last Edit: June 03, 2017, 08:14:20 AM by Gerry Havinga »
Prophet X, Prophet Rev2 and Evolver desktop, Waldorf Blofeld, Roland System-1, Nord Rack 2, Akai S5000, Dato DUO, Elektron Digitone, Deepmind12D, Schrittmacher, Bitwig v3. Daw-less...
https://gezz1.bandcamp.com/releases
https://soundcloud.com/gezz_havinga
https://gezz.eu
https://synthernational.eu/

Re: Anyone good with midi box/hardware building?
« Reply #3 on: June 04, 2017, 06:14:24 AM »
The problem is also etching a circuit board.

I am thinking of getting one of these and writing some python scripts to use it although I really wish I had the one I want built.

http://www.akaipro.com/kb/article/2032#change

Another, slightly messy, alternative is to de-solder the knobs and button switches from the Akai Pro unit, replacing these with larger panel-mounted potentiometers + toggle switches / momentary buttons.

It may require a bit of soldering, but you'd get the layout you'd need while continuing to use the Akai editor as a stopgap to a dedicated, FOSS, custom-software controller (e.g., PyBoard).
Sequential / DSI stuff: Prophet-6 Keyboard, Prophet 12 Keyboard, Mono Evolver Keyboard, Split-Eight, Prophet 2000