Purpose: Radioform is a free, open-source system-wide equalizer for macOS.
System audio: It routes audio from Mac apps through a virtual output device and EQ engine to the selected speakers or headphones.
Equalizer: The equalizer has ten bands spanning 32 Hz to 16 kHz, with adjustable gain and Q.
Presets: Built-in presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat.
Custom curves: Users can save custom EQ curves and name them for the headphones they were made for.
Limiter: A built-in limiter and preamp are described as catching clipping when EQ is pushed hard.
Device switching: Radioform can switch audio devices without restarting and keeps the EQ on as the output changes.
Performance: The maker reports under 1% CPU usage on Apple Silicon and no audible delay.
Compatibility: Radioform requires macOS 13.0 Ventura or later and runs on Apple Silicon and Intel Macs.
Signing and updates: Releases are signed and notarized by Apple, and updates come through Sparkle.
Privacy: The maker states that Radioform collects no data.
License: Radioform is open source under GPLv3.
Implementation: The audio engine is written in C++, while the menu bar app is native Swift and SwiftUI and uses macOS CoreAudio.
Maker: The site credits Pavlos RSA as the maker and lists [email protected].
Price from: Free

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