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Equaliser
What it is
Equaliser is a free, open-source system-wide audio equalizer for macOS. Audio from every app passes through it automatically, using a custom audio driver to route system sound for processing. Its parametric EQ offers up to 64 bands, each with separate frequency, gain, bandwidth/Q, and filter type controls. Compare Mode lets users compare adjusted settings with the original sound in real time, and 11 factory presets cover music, movies, and other uses. Listed specifications include a 1 Hz–22 kHz frequency range, sample rates up to 768 kHz, and 32-bit float processing. Equaliser can import filter settings from Room EQ Wizard, and the project supports EasyEffects import and preset export for sharing with Linux users. Processing happens locally; the app says it does not record, store, or transmit audio and has no analytics or telemetry. Equaliser is licensed under GPL-3.0. It requires macOS 15 (Sequoia) or later and an Apple Silicon Mac. The app is not notarized by Apple, so macOS may require users to select Open Anyway in Privacy & Security settings.
For and against
For
- Applies EQ to audio from every app
- Provides up to 64 parametric bands
- Includes 11 factory presets
- Processes audio locally without recording or telemetry
Against
- Requires macOS 15 or later
- Requires an Apple Silicon Mac
- Not notarized by Apple
The verdict
Equaliser offers system-wide processing, extensive band controls, and preset compatibility at no cost. Its macOS 15 and Apple Silicon requirements, along with the lack of Apple notarization, are important setup constraints.
Who it suits
Equaliser suits Mac users who want system-wide parametric EQ and whose machines meet its macOS and Apple Silicon requirements. It may also suit users working with Room EQ Wizard or EasyEffects presets.
Plans and prices
Free
Free forever · no ads · no tracking · no subscriptions
Read 4 Oct 2026 · equaliser.knage.net
On the record
- Audio routing
- The README says a custom audio driver captures system audio and routes it through the app for processing.github.com · read 4 Oct 2026
- Audio specifications
- The site lists a frequency range of 1 Hz–22 kHz, sample rates up to 768 kHz, and 32-bit float processing.equaliser.knage.net · read 4 Oct 2026
- Compare mode
- Compare Mode lets users compare EQ settings with the original sound in real time.equaliser.knage.net · read 4 Oct 2026
- Equalization
- It provides up to 64 bands of parametric equalization, with independent frequency, gain, bandwidth/Q, and filter type controls for each band.equaliser.knage.net · read 4 Oct 2026
- Integrations
- Equaliser supports importing filter settings from Room EQ Wizard (REW).equaliser.knage.net · read 4 Oct 2026
- License
- The maker identifies Equaliser as free and open source under the GPL-3.0 license.equaliser.knage.net · read 4 Oct 2026
- Microphone permission
- The README says Equaliser requests microphone permission at launch because macOS requires an audio-input entitlement for a supported capture feature; its default shared-memory capture mode does not require microphone permission.github.com · read 4 Oct 2026
- Notarization
- The maker says the app is not notarized by Apple and may require users to select Open Anyway in macOS Privacy & Security settings.equaliser.knage.net · read 4 Oct 2026
- Preset compatibility
- The project README says Equaliser supports EasyEffects import and export to share presets with Linux users.github.com · read 4 Oct 2026
- Presets
- The app includes 11 factory presets for music, movies, and more.equaliser.knage.net · read 4 Oct 2026
- Privacy
- The README says audio processing happens locally and Equaliser does not record, store, or transmit audio or include analytics or telemetry.github.com · read 4 Oct 2026
- Purpose
- Equaliser is a system-wide audio equalizer for macOS.equaliser.knage.net · read 4 Oct 2026
- Requirements
- The app requires macOS 15 (Sequoia) or later and an Apple Silicon Mac.github.com · read 4 Oct 2026
- System audio
- Audio from every app passes through the equalizer automatically.equaliser.knage.net · read 4 Oct 2026
