This is the keyboard from the last post with some additional stuff. There is a Core module (midibox.org) and a digital in midibox module that reads the switches. I installed the SDK so I can write a minimal program (midibox is programmed in C and produces hex files, uploadable as system exclusive data to the core). So I connected 4 of the switches to make a quick test and connected them all together. I was sure that both midibox modules were ok because I had the midibox sequencer running on them. The simplistic program just adds 40 to the pin number (the one displayed on the LCD) and outputs this as a note on/off midi signal. When all switches get connected, there will be a need for a mapping between module pins and note numbers so there will be some more programming. For now, a small, quickly made video shows that IT WORKS!

(first video for public viewing, so don’t be so harsh

You can also see it in vimeo here: http://vimeo.com/2357167

This is another project I just started working on. It is a keyboard/MIDI controler based on the harmonic table (like the c-thru music controler). This one is just switches which all connect to a midi core module (from ucapps.de) which translates the various keypresses to midi signals. There are 50 keys/notes and although I’m going to use letra-set rub-ons to write the notes onto the keys, you can make out which note is which from the blue keys. They are in pairs and one of each pair (the low/right) is an A (La for europeans) and the other is a C (Do). In the harmonic table layout that the C-thru axis uses (and others) , if you choose one button, the button above it is a fifth, the one to the top/right a minor third and the top/left a major third. (you can see c-thru’s chord calculator here http://www.c-thru-music.com/cgi/?page=layout_ccalc).

The other keys have the following functions: The red keys on Braska’s left “hand” are a row of 11 buttons that instantly transpose
the whole keyboard from -6 to +5 semitones The middle one, a bit spaced appart, is the no-transpose button. The other 2 red buttons are octave up/down and there is a generic slider under his right hand which is assignable to modulation, pitch bend or whatever CC you want. The blue button under his belly is the menu button. There is a 16×2 LCD screen displaying various bits (transpose, octave, pressed key etc) but the software is still in development stage. As soon as a workable version is at hand, I will publish it of course.

The needed hardware is a lot of switches, a midibox core module, an analog in module (for the slider) and two digital in modules for the switches. I have these already made for the midibox sequencer (who still lacks a panel) until I etch some more. http://synth-diy.blogspot.com/2008/10/midibox-sequencer-v33.html

So the following days will hopefuly see a working HT controller. But until then, good night, Braska!

STAY AT 440 Hz!!!!