Soundbox extended with MIDI Polyphonic Expression
Author
Sela, Alexander
Term
4. Term
Education
Publication year
2025
Abstract
This thesis explores the design of a compact and versatile MIDI Polyphonic Expression (MPE) controller that enables expressive per-note control. Following a survey of existing MPE instruments across interface types, the work defines design requirements and builds a multi-interface prototype combining an oblique interface with joysticks mounted over force-sensing resistors (FSRs) and a ribbon interface featuring a SoftPot potentiometer and an additional joystick. A Teensy microcontroller and the standard usbMIDI library are used to implement MPE without specialized hardware, aiming to demonstrate feasibility on widely available platforms. The hardware is arranged in a sandwich-style layout to minimize footprint and improve mobility, with ergonomics addressed through design iterations. The device targets per-note effects such as pitch bend and timbral processing, and the minimum viable product provides sounds from at least two instruments with assignable effects. The report includes evaluation setup and results sections; based on the project abstract, the prototype achieved increased mobility through its compact construction and greater versatility via multiple interfaces. Detailed performance results are not available in this excerpt.
Dette speciale undersøger designet af en kompakt og alsidig MIDI Polyphonic Expression (MPE)-controller, der giver udtryksfuld kontrol pr. tone. Efter en kortlægning af eksisterende MPE-instrumenter på tværs af interface-typer defineres designkrav, og der bygges en multi-interface prototype, der kombinerer et skråt interface med joysticks monteret over kraftfølsomme modstande (FSR) og et bånd-interface med en SoftPot-potentiometer og ekstra joystick. En Teensy-mikrocontroller og det standard usbMIDI-bibliotek anvendes til at implementere MPE uden specialiseret hardware med det formål at demonstrere, at MPE kan realiseres på bredt tilgængelige platforme. Hardwarelayoutet er arrangeret som en sandwich for at minimere pladsforbruget og øge mobiliteten, og ergonomi adresseres gennem designiterationer. Enheden sigter mod pr.-tone-effekter som pitch bend og klangbearbejdning, og minimumsløsningen tilbyder lyd fra mindst to instrumenter med tildelbare effekter. Rapporten indeholder en evalueringsopsætning og resultatafsnit; ifølge projektets abstract opnåede prototypen øget mobilitet gennem kompakt konstruktion og større alsidighed via flere interfaces. Detaljerede resultater fremgår ikke af dette uddrag.
[This apstract has been generated with the help of AI directly from the project full text]