Instrument building and restoration
Building, tuning, repair and modernisation of organs, pianos, harmoniums and electronic instruments.
Workshop and development
Classical instruments, carefully considered technology
ModSystem
A modular, expandable and repairable system for digital, virtual and MIDI instruments.
Custom design
Coordinated design and implementation of mechanics, electronics, amplification, consoles and cases.
mezzoPIANO
The independent mezzoPIANO site presents the story and models of the hybrid pianos.
Visit mezzoPIANOModSystem
Current product catalogue
Central control
Control Module Driver
The central ModSystem controller built around a Raspberry Pi Pico. It connects manuals, a pedalboard and the stop module, with separate driver-bus connections.
Details
LED control
Control Module LED
A dedicated USB-MIDI controller for daisy-chained LED Driver 64 boards. It converts computer MIDI messages into LED-driver control signals.
Details
LED driving
LED Driver 64
A driver board for 64 individual LED channels, using four TLC5925 constant-current ICs. BUS_IN and CHAIN_OUT allow daisy-chaining to further boards.
Details
Keyboard – digital Hall
Manual 64 Hall
A manual board for 64 individual digital Hall sensors. Magnetic key sensing provides contactless on/off states to the central controller.
Details
Keyboard – switch matrix
Manual 64 Reed
A manual board that reads an 8×8 switch matrix for reed-switch or other suitable contact keyboards. The matrix accepts 64 switching points.
Details
Keyboard – analogue Hall
Manual 64 Velocity
A board sampling 64 analogue Hall inputs to track key movement. Central-controller firmware can derive key velocity from the 12-bit ADC’s raw samples.
Details
Stops and expression
Stop Expression 128
A module for stop switches and four analogue expression controls. It forwards switch-matrix and pedal signals to the central controller.
Details
Stops, LEDs and expression
Stop LED Expression 192
A board combining three 8×8 stop banks, LED feedback and four expression inputs. A single module handles switch scanning and illuminated stop indication.
Details
LED-matrix connections
8×8 Scan Matrix LED
An 8×8 row–column connection board for an LED matrix. IDC connectors provide organised wiring for 64 matrix positions.
Details
Switch matrix
8×8 Scan Matrix – diode
A Col-to-Row matrix board organising 64 switching points. Individual 1N4148W diodes provide isolation within the switch network.
Details