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Radioform

radioform.app

Free plan macOS
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Spec score 7.3 #16 of 22 in Audio Equalizer Software

What it is

Radioform is a free, open-source system-wide equalizer for macOS. It routes audio from Mac applications through a virtual output device and EQ engine to selected speakers or headphones. The equalizer provides ten bands from 32 Hz to 16 kHz, with adjustable gain and Q. Built-in presets cover Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat, and users can save named curves for particular headphones. A limiter and preamp are included to catch clipping when EQ is pushed hard. Radioform switches output devices without restarting and keeps equalization active after the change. It requires macOS 13.0 Ventura or later and runs on Apple Silicon and Intel Macs. The maker reports under 1% CPU usage on Apple Silicon and no audible delay. Releases are Apple-signed and notarized, with updates delivered through Sparkle. The maker says no data is collected. Radioform is licensed under GPLv3; its audio engine uses C++, while the native Swift and SwiftUI menu bar app uses macOS CoreAudio.

Spec sheet

Purpose
Radioform is a free, open-source system-wide equalizer for macOS.Read 4 Oct 2026 · radioform.app
Privacy
The maker states that Radioform collects no data.Read 4 Oct 2026 · radioform.app
License
Radioform is open source under GPLv3.Read 4 Oct 2026 · radioform.app
Maker
The site credits Pavlos RSA as the maker and lists [email protected].Read 4 Oct 2026 · radioform.app
Compatibility
Radioform requires macOS 13.0 Ventura or later and runs on Apple Silicon and Intel Macs.Read 4 Oct 2026 · radioform.app
Custom curves
Users can save custom EQ curves and name them for the headphones they were made for.Read 4 Oct 2026 · radioform.app
Device switching
Radioform can switch audio devices without restarting and keeps the EQ on as the output changes.Read 4 Oct 2026 · radioform.app
Equalizer
The equalizer has ten bands spanning 32 Hz to 16 kHz, with adjustable gain and Q.Read 4 Oct 2026 · radioform.app
Implementation
The audio engine is written in C++, while the menu bar app is native Swift and SwiftUI and uses macOS CoreAudio.Read 4 Oct 2026 · radioform.app
Limiter
A built-in limiter and preamp are described as catching clipping when EQ is pushed hard.Read 4 Oct 2026 · radioform.app
Performance
The maker reports under 1% CPU usage on Apple Silicon and no audible delay.Read 4 Oct 2026 · radioform.app
Presets
Built-in presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat.Read 4 Oct 2026 · radioform.app
Signing and updates
Releases are signed and notarized by Apple, and updates come through Sparkle.Read 4 Oct 2026 · radioform.app
System audio
It routes audio from Mac apps through a virtual output device and EQ engine to the selected speakers or headphones.Read 4 Oct 2026 · radioform.app

Plans and prices

Free Free GPLv3 · no subscription Read 4 Oct 2026 · radioform.app

Every Radioform plan and price →

Strong points and limits

Strong points

  • System-wide control across Mac apps
  • Ten adjustable EQ bands
  • Named custom headphone curves
  • Output switching without restarting
  • GPLv3 open-source license

Limits

  • Requires macOS 13.0 Ventura or later
  • No per-app controls
  • macOS only
  • No audible-delay claim is maker-reported

Who it suits

Radioform suits Mac users who want system-wide equalization, headphone-specific curves, and an open-source license. It supports both Apple Silicon and Intel hardware on recent macOS versions.

Verdict

Radioform provides broad system audio equalization with presets, custom curves, and device switching. Its free GPLv3 license and Intel/Apple Silicon support make the platform requirements clear.

Where Specifiction places it

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