MIDI to CV Converters

This freshly updated MIDI to CV converter from PAiA is an economical and versatile solution for interfacing MIDI to the world of analog synthesis and control. It is an easy to build and use system with eight analog outputs that can be Control Voltages, Gates, Triggers, even variable amplitude pulses for triggering analog drum sets. The newly revised firmware allows Multi assignment of notes by midi channel and a DIN sync mode that can also control of one or two synths while sync is running.

Operating modes in the v.2.0 firmware allow:

• Pitch and Gate control of 4 synth voices.
Either Multi (assignment of data from four midi channels) or Mono (rotational assignment of data from one midi channel) operation.
• Pitch, Velocity and Gate control of 2 voices plus Pitch and Mod wheel CVs. Either Multi or Mono assignment can be selected.
• Pitch, Velocity, Pitch Wheel, Mod Wheel, Release Velocity, Channel Pressure, Gate and Re-trigger. Complete, true staccato control of one synth voice.
• 8 CVs from Continuous Controller messages. Controllers can be on one midi channel or separate channels.
• Analog Drum Trigger Mode. 8 pulses by note# with pulse amplitude set by note velocity.
• DIN Sync - 24ppq, Start, Stop and Continue PLUS simultaneous control of a single Pitch, Velocity, Gate, Wheel, Re-trigger synth voice or two multi-assigned voices with Pitch, Velcocity, and Gate.
• Self-Test. Separate checks of midi input and analog outputs verify operation and aid in set-up and trouble-shooting.

The native tempering of the midi2cv8 is more than 10 octaves (127 semi-tones) of V/oct. scaled Control Voltages for MOOG, ARP and other linear CV synths. An optional V/Hz conversion board (shown installed in the photo above) provides five octaves of exponentially scaled Control Voltages for PAiA, Korg and some Yamaha synths. Open collector transistors on each output provide for "S" and wired-or Triggers and a MIDI Thru jack allows easy expansion through daisy-chaining.

5 pin DIN connectors and keyboard style DIP switch for channel and mode selection mount on the circuit board and are included in the basic kit. For retrofit and custom applications the midi2cv8 is supplied without case, jacks, power switch and transformer.

The FracRak accessory package shown in image includes punched, anodized and legended 2W FracRak panel, power switch, 12 VAC/300 mA. wall mount transformer and eight 1/8" stereo phone jacks for output connections.

The Rack mount accessory package shown right fits two midi2cv8 boards in a 1U rack space and includes enclosed case with punched, anodized and legended rack panel, power switch, transformer and sixteen 1/8" stereo phone jacks.

Our policy of free firmware upgrades with no time limit to the original purhaser protects your hardware investment. Midi2cv8 purchasers with firmware versions earlier than 2.0 should arrange for an upgrade to get the additional functionality that these revisions provide.

Home » MIDI to CV Converters   9700K MIDI2CV8 Electronics Kit Kit has all electronic parts, circuit board, pc mount DIN jacks and MIDI Channel / Operating Mode switch. Price: $122.45 9700FRM FracRak Accessory Kit 9700FRM FracRak Accessory Kit adds Transformer, Switch, 8 Stereo Jacks, punched, black coated panels with a light texture finish and white legend, 2W FracRak panel and all hardware. Price: $33.95 9700FRMP FracRak Accessory Kit (International Version - ships without 110V power supply) 9700FRMP FracRak Accessory Kit adds a Switch, 8 Stereo Jacks, punched, black coated panels with a light texture finish and white legend, 2W FracRak panel and all hardware. (International Version -- ships without 110V power supply.) Price: $29.95 9700rck Rack Mount Accessory Kit Adds transformer, switch, 16 jacks and fully enclosed 1U rack case with punched, black anodized, grey legended panel and all hardware.       Out of Stock Price: $61.70 Out of Stock 9700VHZ MIDI2CV8 Volts/Hertz Option 9700VHZ Volts/Hertz Option for exponential pitch cv scaling.  Includes all components and circuit board with mounting hardware. Price: $18.05

Need more information?

Operating modes and options (PDF)  - You'll find a detailed, illustrated explanation of the midi2cv8 operating modes in this pdf file..

midi2cv8 Schematic (PDF) - 200k pdf file with schematics for midi2cv8 and V/Hz adapter. Notice that all 8 outputs are identical and defined by software as being a CV or Gate output. The open collector of the transistor at each output is handy for wired-or ("S") triggers or driving relays or motors.

Ver 2.0 firmware (ZIP)- Zipped source, list and Intel style .hex files. For those that want to add modes, there is a useful tool-box of subroutines to handle running status, note name to pitch and V/oct. to V/Hz. conversions, pulse timing and other details. Extensive comments explain code function. Permission is granted to use this copyright code in your personal-use, non-commercial application. (kit includes a programmed PROM)