Formanta Maestro MIDI retrofit Installation manual Vitalka Custom A03 and Resonance MOD
Retrofit receives MIDI notes and triggering circuit boards the same as you playing on the keyboard with hands and triggering key contacts. It controls only the keyboard, all other controls in your hands and you still can play with the keyboard at the same time when it controls with MIDI.
Welcome to the metric system zone. Here we work with precision things and all dimensions are metric. 1" = 25.4mm.
Installation:
Select the right place to mount the LED, DIN5 MIDI connector and button on your synth (on the back panel near jacks for example). PCB can be mounted under the keyboard or between aluminum keyboard frame and enclosure (need to cover board with insulation)
Solder wires and try to check working before drilling holes in the enclosure.
Drill dimensions:
DIN5 = 18mm. Can be installed near audio output connectors
LED indicator = 6mm.
Push button = 12.5-13mm.
Be careful with drilling hole for button, it have small range to get hole too big.
Board dimensions and distance between screws:
Board dimensions 102x50mm.
Holes distance 94x39mm - Use it for drill holes for board mounting.
Holes diameter 3.5mm.
Do not allow the board to bend, it can break the board.
All ribbon cables are 1M long, enough for placing all connections and you can cut extra length.
Panic button is not included in the kit. In case of panic - enough turn off and turn on the synth.
This picture shown first (1) pin/wire on all connectors:
All next wire should be connected to each key contact or to the main board:
The next picture shows the pinout for 8 wire ribbon cable and pin number of wires:
Same you can see on bottom side of PCB for more convenience.
You will need to connect wire 4 (GND) with LED and button. All other wires in this kit required only one point of soldering.
(7) V+ and (8) GND should be soldered on the next points:
One small important thing - use hot glue to fix inserted connectors to protect from disconnecting them during vibration when you ride on tour. Also fix wires strong. Do not leave them holding only on soldering joints.
Process for set MIDI channel:
Stop all MIDI traffic.
To teach with which MIDI channel synth will work - push the black button (LEARN) LED will blink two times and stay ON to wait for MIDI messages on OMNY channel.
Send any note on the MIDI channel which you want for this synth.
When the synth receives MIDI messages, LED will blink five times and turn OFF. And then will ON with every NOTE ON messages on the selected channel.
Now the channel saved to memory and will never change before you push LEARN button again and starts settings process again.
