spectral-processing

Noise Canvas is a sound design tool in which you paint sounds or effects directly into a spectrogram. Kind of like Photoshop but for sound. Free download for Mac, Windows and Linux.

C library for audio noise reduction and other spectral effects

A Spectral Filter VST built with Juce.

DtBlkFx for modern macOS — free 64-bit VST3 and AUv2 for Apple Silicon and Intel Macs, preserving the original FFT spectral effects, UI, presets, and sound.

A drone-ambient synthesizer for slowly breathing clusters: just intonation, a conductor that plays all night, distance as the one number that shapes every voice, 24 source types, three reverb tiers, and 14592 presets measured by rendering them. Framework-free C++20 core, JUCE shell. VST3 + standalone.

High-fidelity 10-band spectral dissector for VCV Rack.

⬡ SYNDRAVA ⬡ - Chaotic AI Drum Brain | Max for Live hybrid sampler/sequencer with touch surface, feedback chaos, and spectral AI processing

Free open-source all-in-one VST3/CLAP effects rack — 11 modules uniting SpectralSuite & nih-plug plugins in one chain. / 免费开源多合一效果器机架：整合 SpectralSuite 与 nih-plug 的 11 个效果模块，共享单一信号链。

Drawable rainbow-leprechaun spectral filter, FFT damage processor, and dual stereo delay for REAPER

Turn an image into a stereo field. Move, scale and rotate an image plane and hear the space follow, with the same picture traced by the sound in a polar analyser. Use an image, text or a generated shape. VST3, AU and Standalone, and it also runs in the browser.

Extreme time-stretching and ambient texture — PaulStretch, spectral freeze, granular cloud, phase vocoder. Zero deps.