Pete Brown at 10rem.net is building a custom 10x MIDI Thru box based on the 5x MIDI Thru circuit available at the Highly Liquid library.
To date, Pete has written 5 detailed blog posts for the ongoing project:
Potentially useful information for those attempting a MIDI project or DIY circuit board design.
The new MIDI CPU accepts input from switches, potentiometers, rotary encoders, switch matrices and external digital & analog signals. In response, it generates virtually any type of MIDI message. Buy now!
The MIDI CPU ships fully assembled. Simply attach MIDI connectors, control components, and a battery or DC power supply.
- 24 independent input terminals
- Monitors up to 128 switches, 14 potentiometers, or 12 encoders
- Allows mixed input types
- Merges MIDI input with locally generated messages—multiple units share a single MIDI Out port
- Powered via battery or DC supply between 3.3V and 12V
- Measures only 66mm x 38mm (2.6″ x 1.5″)
- Configured via MIDI SysEx message
- User-upgradeable firmware
The MIDI CPU has a long list of potential applications. Build your own traditional footswitch, keyboard, or “knob box” controller. Build your own alternative MIDI controller—optical theremin, fret-based controller, etc. Generate MIDI note patterns or CC waveforms from digital or analog signals. Re-purpose a “consumer” keyboard, calculator, game controller, or other electronic device as a MIDI controller.
These possibilities will be explored with “how-to” information at the blog and forums.
Have you registered yet? The forums are the best place to ask for product information or technical support.
Robert at Alien-Devices (MySpace) has been producing quality modified & circuit bent gear for almost a decade. Alien-Devices now offers installation service for Highly Liquid MIDI retrofits and has begun to add MIDI control to projects via Highly Liquid MIDI decoders.
See Robert’s MySpace blog for projects such as this modified MIDI SK-5:
Add a MIDI input to your Yamaha CS01 with the new CS01-MIDI kit. The kit triggers the entire 68-note range of the keyboard without user adjustment of the octave select switch.
Male and female inline MIDI connectors are now available. An inline connector can be hardwired to a MIDI decoder or MIDI encoder board in applications where a panel-mounted socket is not desirable.
Forum member GoatBoy used the MSA-R to provide MIDI control for an array of solenoid-activated bells. (Note: The MSA-T and MSA-P may be better choices for solenoid-based projects.)
Spunky Toofers used an Akai EWI 3000 to trigger a MIDISpeak and effects.
Siempre La Luna documented the MIDISpeak assembly process and installation process.
Thomas S. photographed his MIDI Xbox controller for use with music games.
Here is a MIDI standard-compliant 5 x MIDI Thru Circuit. Each MIDI Thru port generates an exact replica of the MIDI signal on the MIDI In port.
- C1 – C3: 0.1uF Ceramic Chip Capacitor
- C4: 47uF Electrolytic Capacitor
- D1: 1N4148 Small Signal Diode
- IC1: 7805 Voltage Regulator
- IC2: 6N136 Opto-Isolator
- IC3: 7414 or 7404 Hex Inverter
- R1, R3-R12: 220Ω Resistor, 1/8-watt or 1/4-watt
- R2: 10kΩ Resistor, 1/8-watt or 1/4-watt
MIDI-modified Stylophone controlled with a bent TR-505 and MSA-R (Diabolical Devices):
MIDI2600-Internal installation video (Siempre La Luna):
DIY MIDI drum machine incorporating an MSA kit and a Farfisa organ percussion module (Quiet Channel):
MIDISpeak dual-mode installation (Erik Tinberg):
This Is The Sound, the new release from Burnkit2600 which features MSA-R controlled bent percussion:
Custom MSA-R based MIDI control box with video (The Umbrella Company):