Free real-time audio effects for music listening: EQ, tube amp, AM radio, visualizer, and 100+ more. Web/PWA, desktop, Chrome/Edge extension, VST3.
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Updated
Nov 5, 2026 - JavaScript
Free real-time audio effects for music listening: EQ, tube amp, AM radio, visualizer, and 100+ more. Web/PWA, desktop, Chrome/Edge extension, VST3.
Double-blind ABX testing tool
Open specification for the .batest file format, used for blind audio comparison tests
Transcode and compare audio bitrates and encoders on the go. ABX Testing and bring your own music!
Make a Bluetooth headphone sound its best on Linux (PipeWire/WirePlumber): stay on A2DP, measure AAC/SBC and link health, local parametric EQ console with crossfeed, presets, live analyzer and blind ABX test. Tested with Solix Nexus ANC (Bluetrum TWS).
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