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Peer-reviewedCC BY 4.0Journal Hardware and Systems Security

PolyUAnalog: A Modular and Scalable Open-Source Architecture for Polyphonic Analog Synthesis

  • Dominique Guichaoua
  • Matthieu Loumaigne
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Abstract

This paper describes the design and implementation of PolyUAnalog, a modular and open-source polyphonic analog synthesizer. The architecture utilizes the AS3397 analog voice chip, with each voice managed by a dedicated RP2040 microcontroller. System coordination, including MIDI processing and voice allocation, is handled by a central conductor board communicating over an I 2 C bus. Technical implementation details and associated measurements are provided regarding real-time DCO pitch stabilization via a PID feedback loop and the generation of high-resolution control voltages using filtered Pulse Width Modulation (PWM). The complete hardware schematics and C++ software stack are documented to facilitate replication, modification, and further development within the electronic musical instrument community.

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Cite

BibTeXRIS
BibTeX
@article{guichaoua2026polyuanalog,
  title = {{PolyUAnalog: A Modular and Scalable Open-Source Architecture for Polyphonic Analog Synthesis}},
  author = {Dominique Guichaoua and Matthieu Loumaigne},
  journal = {Journal Hardware and Systems Security},
  year = {2026},
  month = jul,
  doi = {10.3390/hardware4030014},
  url = {https://hal.science/hal-05745582v1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - PolyUAnalog: A Modular and Scalable Open-Source Architecture for Polyphonic Analog Synthesis
AU  - Dominique Guichaoua
AU  - Matthieu Loumaigne
PY  - 2026
DA  - 2026/07/07
JO  - Journal Hardware and Systems Security
DO  - 10.3390/hardware4030014
UR  - https://hal.science/hal-05745582v1
AB  - This paper describes the design and implementation of PolyUAnalog, a modular and open-source polyphonic analog synthesizer. The architecture utilizes the AS3397 analog voice chip, with each voice managed by a dedicated RP2040 microcontroller. System coordination, including MIDI processing and voice allocation, is handled by a central conductor board communicating over an I 2 C bus. Technical implementation details and associated measurements are provided regarding real-time DCO pitch stabilization via a PID feedback loop and the generation of high-resolution control voltages using filtered Pulse Width Modulation (PWM). The complete hardware schematics and C++ software stack are documented to facilitate replication, modification, and further development within the electronic musical instrument community.
SN  - 2509-3428
SN  - 2509-3436
ER  -