Arhythmetic Units

Research

Inside the
instruments.

Working papers and technical reports on the methods, design decisions, and tradeoffs behind the software.

01 / Spectral analysis 02 / Console emulation
Draft paperOctober 2026

Scheduling FFT-Based Spectral Analysis in the Audio Processing Loop

Christian Kauten · Arhythmetic Units

CoopFFT spreads spectral analysis across successive audio-sample calls, without a separate analysis thread. The paper explores the tradeoff between smaller processing bursts, total work, and the delay before a spectrum is ready.

Read the draft PDFExplore Fourier

Draft manuscript, version 5 · Available with Fourier v2.2.1.

Cite this work 
@techreport{kauten2026fourier,
  author      = {Kauten, Christian},
  title       = {Scheduling FFT-Based Spectral Analysis in the Audio Processing Loop},
  institution = {Arhythmetic Units},
  year        = {2026},
  month       = oct,
  type        = {Technical report},
  note        = {Release v2.2.1; Manuscript version 5; not yet deposited on arXiv},
  url         = {https://github.com/Kautenja/ArhythmeticUnits-Fourier/releases/download/v2.2.1/Fourier-whitepaper.pdf},
}
Canonical BibTeX Manuscript & source
Technical reportSeptember 2026

RackNES: A Voltage-Controlled NES Emulator as a Musical Instrument

Christian Kauten · Arhythmetic Units

A look inside a console emulator embedded in an audio-processing loop. The report follows three ways into the machine—gameplay, execution, and memory—and examines timing, audio routing, and the difference between recalling a state and replaying a sound.

Read the report PDFExplore RackNES

Manuscript version 1 · Repository manuscript, dated September 30, 2026. A retrospective design and implementation account.

Cite this work 
@techreport{kauten2026racknes,
  author      = {Kauten, Christian},
  title       = {{RackNES}: A Voltage-Controlled {NES} Emulator as a Musical Instrument},
  institution = {Arhythmetic Units},
  year        = {2026},
  month       = sep,
  type        = {Technical report},
  note        = {Manuscript version 1, dated September 30, 2026; repository manuscript},
  url         = {https://github.com/Kautenja/RackNES/tree/master/whitepaper},
}
Canonical BibTeX Manuscript & source

Further work

Maw and Quadra.

Writing on vocal synthesis and DJ performance may follow as these projects develop. Both instruments are currently in development.

About Maw About Quadra