# Arhythmetic Units

> Independent music software for synthesis, mixing, and signal analysis.

Product pages describe current availability and distinguish released features from development previews. Free plugins install through the VCV Library. Products in development have no public download or announced price.

## Products

- [Maw](https://arhythmetic-units.com/products/maw/): In development. Maw is a vocal VST3 synthesizer in development. Explore Atlas voices, formant shaping, Gesture patterns, and playable factory-sound previews.
- [Quadra](https://arhythmetic-units.com/products/quadra/): In development. Quadra is native macOS DJ software in development, with music-library browsing, track analysis, and recommendations. Assisted transitions are in progress.
- [Fourier](https://arhythmetic-units.com/products/fourier/): Free. Free spectrum analysis for VCV Rack: compare four signals with Fourier and explore frequency changes with Spectre. Find screenshots, manuals, and downloads. [VCV Library](https://library.vcvrack.com/ArhythmeticUnits-Fourier).
- [Potato Chips](https://arhythmetic-units.com/products/potatochips/): Free. Free chiptune modules for VCV Rack: explore classic sound-chip oscillators, FM, wavetables, filters, and echo. Find patch ideas and installation guides. [VCV Library](https://library.vcvrack.com/KautenjaDSP-PotatoChips).
- [RackNES](https://arhythmetic-units.com/products/racknes/): Free. RackNES is a free voltage-controlled NES emulator for VCV Rack. Explore controller gates, individual audio outputs, saved states, and the CV Genie expander. [VCV Library](https://library.vcvrack.com/KautenjaDSP-RackNES).

## Website

- [Home](https://arhythmetic-units.com/): Independent music software for synthesis, mixing, and signal analysis. Explore free VCV Rack plugins, research, and instruments in development.
- [Instruments & tools](https://arhythmetic-units.com/products/): Browse Arhythmetic Units instruments and tools: three free VCV Rack plugins, plus the Maw vocal synthesizer and Quadra DJ app in development.
- [Research](https://arhythmetic-units.com/research/): Working papers and technical reports from Arhythmetic Units on FFT scheduling, console emulation, and audio software, with PDFs and citations.
- [Downloads & manuals](https://arhythmetic-units.com/downloads/): VCV Library links and manuals for Fourier, Potato Chips, and RackNES, with availability information for Maw and Quadra.
- [Support](https://arhythmetic-units.com/support/): Contact Arhythmetic Units for installation help and bug reports. Find answers about downloads, VCV Rack accounts, and website motion.
- [About](https://arhythmetic-units.com/about/): Independent music technology. A one-person company working in synthesis, signal processing, and research, with roots in electronic music.

## Research

- [Scheduling FFT-Based Spectral Analysis in the Audio Processing Loop](https://arhythmetic-units.com/research/#coopfft): Draft paper. Draft manuscript, version 5 · Available with Fourier v2.2.1. [PDF](https://arhythmetic-units.com/research/fourier-whitepaper-v2.2.1.pdf). [BibTeX](https://github.com/Kautenja/ArhythmeticUnits-Fourier/blob/v2.2.1/docs/whitepaper/CITATION.bib).
- [RackNES: A Voltage-Controlled NES Emulator as a Musical Instrument](https://arhythmetic-units.com/research/#racknes): Technical report. Manuscript version 1 · Repository manuscript, dated September 30, 2026. A retrospective design and implementation account. [PDF](https://arhythmetic-units.com/research/racknes-whitepaper-2.2.0.pdf). [BibTeX](https://github.com/Kautenja/RackNES/blob/master/whitepaper/CITATION.bib).

## Manuals

- [Fourier manual](https://github.com/Kautenja/ArhythmeticUnits-Fourier/releases/latest/download/Fourier.pdf): Fourier documentation.
- [Spectre manual](https://github.com/Kautenja/ArhythmeticUnits-Fourier/releases/latest/download/Spectre.pdf): Fourier documentation.
- [Installation and module guides](https://github.com/Kautenja/PotatoChips#readme): Potato Chips documentation.
- [RackNES manual](https://github.com/Kautenja/RackNES/releases/latest/download/RackNES.pdf): RackNES documentation.
- [CV Genie manual](https://github.com/Kautenja/RackNES/releases/latest/download/CVGenie.pdf): RackNES documentation.