Introducing the world's first Open Source MIDI keyboard with semi-weighted hammer action keys, hi-res velocity, polyphonic after touch and release velocity
The New VAXMIDI
An instrument that was designed to evolve, yet built to last forever...
Every schematic, every part drawing, and all source code is published and freely available under the Open Source Initiative
Imagine a truly expressive instrument that you build, customize, and maintain yourself
Imagine 14 bit velocity and polyphonic after-touch
with an expansive range of sensitivity settings
HOW MANY OCTAVES WOULD YOU LIKE?
Choose the 8 octave model or start with a 4 or 6 octave model and add more later
The microprocessor clocks the sensors at 200 KHz which is 5 microsecond resolution. The U shaped sensor from Vishay Semiconductor has an led on the left wall and a .3 mm detector slot on the right wall. The wing of the hammer flies through the sensor when a key is pressed. When the notch crosses the path of the led, the detector measures the length of the pulse to determine the key velocity. Notice the triangular window beyond the notch. It is in the detector path when the key is depressed and when the key is pressed harder the hammer moves and lets more light hit the detector. That is how polyphonic after-touch is generated.
VAXMIDI is less than 1/3 the price of our first product, the VAX77. This low cost is only possible because we ask that you perform the final assembly yourself. Review the assembly instructions; the only tool you need is a screwdriver. It is not a difficult task but you will have to dedicate several hours to the project. Take your time, build it with care and you will have a rock solid instrument that will last decades. It was designed to be maintenance free but easy to modify with future enhancements from Infinite Response and other members of the VAXMIDI community. We plan to strongly support the community with forums for building VAXMIDI, accessorizing it, and supporting software developers that want to add new capabilities to VAXMIDI. Join us.