Fluid Tonality

See this documentation of experiments with magnetic impact of the strings, for sounding examples.

Monochord setup with en electro magnet close to the center of the string and two picups, one in each end for monitoring. IAC February 2025

Two different ways of achieving inharmonic overtones: Ring magnet or Blu-tack

Attempt to control the string from both sides with two magnetic coils

Feedback system using three magnetic inducers placed at 1/8, 2/8, and 3/8 of the string length respectively. By choosing either positive or negative feedback for each of the three channels I can control which overtone to sound (any of the first 7 partials).

Three channel feedback. As seen in the far end of the string, the pickup is positioned vertically to detect the horizontal waves induced by the three electromagnets.

Calibration of the electromagnets: By attaching a permanent magnet to the core of the electro magnet the signal got ofset. The stronger the permanent magnet, the stronger the impact signal of the magnetic inducer.

Bad position of 1000W amplifiers under the sensitive magnetic sensors. This gave a loud 50 hz hum in my first spectral analysis. Moving them to the other end of the room solved that problem

Last updated March 10th - 2025