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Radioform

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Radioform's own site

What Radioform is

Radioform is a free, open-source equalizer for macOS that applies sound adjustments to audio across Mac apps. It routes system audio through a virtual output device and EQ engine to the selected speakers or headphones. Its ten bands cover 32 Hz to 16 kHz, with adjustable gain and Q. Built-in presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat; users can also save custom curves and name them for particular headphones. A limiter and preamp are described as helping catch clipping when EQ is pushed hard. Radioform can switch output devices without restarting while keeping the EQ active. It runs on Apple Silicon and Intel Macs with macOS 13.0 Ventura or later. The maker reports under 1% CPU usage on Apple Silicon and no audible delay. Releases are signed and notarized by Apple, and updates come through Sparkle. The maker says the app collects no data. It is licensed under GPLv3; its audio engine uses C++, and its menu bar app is native Swift and SwiftUI using macOS CoreAudio.

Who it suits

Radioform suits Mac users who want system-wide equalization, adjustable bands, and headphone-specific curves. It requires macOS 13.0 Ventura or later and supports Apple Silicon and Intel Macs.

What it does well

  • Free, open source, and licensed under GPLv3.
  • Ten adjustable bands span 32 Hz to 16 kHz.
  • Includes presets and saved custom EQ curves.
  • Switches output devices without restarting.
  • Maker states that it collects no data.

What to know first

  • Requires macOS 13.0 Ventura or later.
  • Does not offer per-app controls.
  • Available only for macOS.

Plans

PlanBilled and limitsPrice
FreeGPLv3 · no subscriptionFree

As radioform.app lists them, read 4 Oct 2026. The maker's own page has the final word.

Getting started

  1. Visit the Radioform website.
  2. Use a Mac running macOS 13.0 Ventura or later.
  3. Install Radioform for Apple Silicon or Intel Mac.
  4. Choose an output device and select a preset or adjust the EQ.

Verdict

Radioform provides system-wide EQ with presets, custom curves, and device switching on supported Macs. Its macOS requirement and lack of per-app controls are worth considering before choosing it.

Questions

How much does Radioform cost?

Radioform is free, with no subscription.

Is Radioform open source?

Yes. It is licensed under GPLv3.

Which Macs can run Radioform?

It requires macOS 13.0 Ventura or later and supports Apple Silicon and Intel Macs.

Does Radioform have per-app controls?

No. Its equalizer controls system audio.

Does Radioform collect data?

The maker states that Radioform collects no data.

Who makes Radioform?

The site credits Pavlos RSA as the maker and lists [email protected].

Facts from Radioform's own pages

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

Where Radioform stands on Freedom251

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