Instrument archive / research through making

Instruments

Experimental string instruments built as compositional systems: acoustic bodies coupled to electronics, motors, feedback networks and interfaces.

I—02 / 2023—ongoing

Misfit Harp

A modular electromechanical string instrument developed for sustained sound, glissandi, multichannel output and cross-feedback between strings.

8-string system · electromagnetic actuation · motorised tension · matrix routing · modular 3030 aluminium framework
Misfit Harp on stage at Korzo
In Bloom — Control and Chaos · Korzo · The Hague · 1 Nov 2025Photography: Stephan C. Kaffa
Origin / compositional need

From sound mass to machine.

The project grew from a musical problem: how can one performer improvise with dense, sustained layers of strings while retaining precise control over pitch movement and spatial output? The answer gradually shifted from composition software toward the design of a new instrument.

The Misfit Harp expanded an earlier two-string prototype into a modular system. Individual pickups, resonator coils, tuning mechanisms and string divisions can be repositioned, turning the instrument itself into a site of ongoing experimentation.

StringsMultiple individually amplified metal strings
SustainElectromagnetic feedback / custom driver coils
PitchStepper-motor control of string tension
RoutingCross-feedback matrix between strings
StructureModular aluminium extrusion with movable wooden modules
Live documentation

In Bloom — Control and Chaos

Korzo, The Hague · 1 November 2025. The performance places the instrument at the centre of a dark stage, exposing the physical act of routing and tuning the system.

Audience around the Misfit Harp at Korzo
Performance viewPhotography: Stephan C. Kaffa
Ensemble performance

Spaceship Ensemble

The Misfit Harp also functions in ensemble settings, extending the project beyond the solo instrument/performance format.

I—01 / first prototype

Sustain Puppeteer

A two-string proof of concept combining electromagnetic sustain, motorised pitch control, custom pickups and a wireless gesture-controller experiment.

2 strings · LM386 feedback system · stepper motors · custom pickups · ESP32 controller research
Sustain Puppeteer prototype
First integrated prototypeWood / strings / motors / feedback electronics
Discovery

The accident that became the method.

While testing alternative connections between the feedback circuits, the two strings were cross-coupled: the resonance of one could excite the other. With motorised changes in tension, the feedback loop began producing unstable harmonics and unpredictable melodic motifs.

This behaviour changed the direction of the project. Rather than treating unpredictability as a fault, it became a compositional resource and one of the foundations of the later Misfit Harp.

Early Sustain Puppeteer system sketch
Hand-drawn LM386 amplifier schematic
Hand-drawn cross-feedback matrix
Video documentation

Sustain Puppeteer

Early video documentation of the prototype and its behaviour.

Museum iteration / 2026

Music Machines & Me

A new version of Sustain Puppeteer presented at Museum Speelklok in Utrecht as part of the interactive Music Machines & Me exhibition.

Museum exhibition ↗
I—MB / performance instrument

Misfit Box

A compact self-built performance instrument developed for improvisation and used alongside Sustain Puppeteer in live work.

hand-built instrument · live electronics · improvisation
Misfit Box on the workbench
Misfit BoxSelf-built performance instrument
Performance tool

A smaller machine for live dialogue.

The Misfit Box was developed as a hands-on instrument for live improvisation. It has been used together with Sustain Puppeteer, allowing the performance to move between direct human control and the more autonomous behaviour of the feedback-based string system.

Video documentation

Misfit Box

Video documentation of the instrument in use.