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Radioform
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 equalizer engine to selected speakers or headphones. Its equalizer provides ten bands from 32 Hz to 16 kHz, with adjustable gain and Q. Presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat, while custom curves can be saved and named for particular headphones. A built-in limiter and preamp are described as catching clipping when equalization is pushed hard. Radioform switches output devices without restarting and keeps equalization active as the output changes. The maker reports under 1% CPU usage on Apple Silicon and no audible delay. It requires macOS 13.0 Ventura or later and supports Apple Silicon and Intel Macs. Releases are signed and notarized by Apple, updates use Sparkle, and the maker states that no data is collected. It is licensed under GPLv3.
For and against
For
- Free GPLv3 open-source software
- Ten-band EQ from 32 Hz to 16 kHz
- Saved curves can be named for headphones
- Switches output devices without restarting
- No data collection stated
Against
- macOS only
- No per-app controls
- Requires macOS 13.0 Ventura or later
The verdict
Radioform provides broad system audio control with ten adjustable bands, presets, and saved curves. Its macOS-only scope and lack of per-app controls define who will benefit most.
Who it suits
It suits Mac users who want system-wide sound adjustment, presets, or headphone-specific curves. It is for macOS 13.0 Ventura or later on Apple Silicon or Intel Macs.
Plans and prices
Free
GPLv3 · no subscription
Read 4 Oct 2026 · radioform.app
On the record
- Compatibility
- Radioform requires macOS 13.0 Ventura or later and runs on Apple Silicon and Intel Macs.radioform.app · read 4 Oct 2026
- Custom curves
- Users can save custom EQ curves and name them for the headphones they were made for.radioform.app · read 4 Oct 2026
- Device switching
- Radioform can switch audio devices without restarting and keeps the EQ on as the output changes.radioform.app · read 4 Oct 2026
- Equalizer
- The equalizer has ten bands spanning 32 Hz to 16 kHz, with adjustable gain and Q.radioform.app · read 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 · read 4 Oct 2026
- License
- Radioform is open source under GPLv3.radioform.app · read 4 Oct 2026
- Limiter
- A built-in limiter and preamp are described as catching clipping when EQ is pushed hard.radioform.app · read 4 Oct 2026
- Maker
- The site credits Pavlos RSA as the maker and lists [email protected].radioform.app · read 4 Oct 2026
- Performance
- The maker reports under 1% CPU usage on Apple Silicon and no audible delay.radioform.app · read 4 Oct 2026
- Presets
- Built-in presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat.radioform.app · read 4 Oct 2026
- Privacy
- The maker states that Radioform collects no data.radioform.app · read 4 Oct 2026
- Purpose
- Radioform is a free, open-source system-wide equalizer for macOS.radioform.app · read 4 Oct 2026
- Signing and updates
- Releases are signed and notarized by Apple, and updates come through Sparkle.radioform.app · read 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 · read 4 Oct 2026
