ED107 - About

ED107 - PolyDAC(X) MIDI-CV

The PolyDAC was a 4-channel MIDI-CV Converter originally designed by Paul Maddox and later released as open source.

The current ED107 firmware uses a 'Regular Cyclic' Mode for MIDI Note assignment. Incoming MIDI notes are assigned to the next free voice (even if it is the same note played repeatedly). So, each time you play a note it will step through and assign channels '1' then '2' then '3' then '4' then back to '1' again as you play. If you hold a note, new notes will be assigned to the next voice in that order that is free. If all voices are already assigned to held notes, the next note will use the lowest voice held.

SPECIFICATION

Resolution

12-bits on all analogue outputs

Gate (x4)

scaleable from 5V to 10V (factory build = 5.0V)

Note (x4)

1V/Oct

Velocity (x4)

0-10V

Pitchbend

-1V through to +1V

Mod Wheel

0V through to 10V

After touch

0V through to 10V

Sustain

0V, 10V when on

CC1 - CC4

0V to 10V

RETRIGGER

When set to on and a new note comes in whilst an old one is held, the gate will ‘dip’ briefly

Mode

MONO1	All four outputs operate in parallel and are assigned to the same MIDI Channel
MONO2	Output 1 is assigned to a MIDI Channel. Output 2 is pre-assigned to 'output channel 1' + 1 Output 3 is pre-assigned to 'output channel 1' + 2 Output 4 is pre-assigned to 'output channel 1' + 3
POLY	Polyphony Mode

IGNORE/STEAL

(Poly mode only)

This allows you to select what happens to incoming notes when you have 4 held down.
Poly1 new notes are ignored, Poly 2 the oldest note is replaced

ASSIGN

This allows you to assign MIDI CC’s to the 4 ‘CV’ outputs.

Module Width	30HP
Module Depth	60mm
+12V @	120mA
-12V @	20mA

Build Guide

User Guide