Project
Tuner AUv3
Precision tuning — as a plugin or standalone
What it is
Tuner AUv3 is a high-precision chromatic tuner delivered as an iOS and Mac AUv3 plugin and standalone app. It features real-time pitch detection, a reference tone generator, low-latency audio passthrough, and A=430–450 Hz calibration so you can tune to any reference pitch your session needs.
Who it’s for
Musicians tuning guitar, bass, violin, or any pitched instrument on iOS and Mac — either inline in a DAW or as a quick standalone tuner.
Features
Chromatic tuning
Detects any pitched note — not limited to standard guitar tunings — and reports cents off in real time.
Reference tone generator
Play a reference tone for any note so you can tune by ear or check your instrument against the app.
Low-latency passthrough
Hear your instrument while tuning without distracting round-trip delay, so it works live, not just in practice.
Real-time pitch detection
Stable, responsive detection that tracks plucks and sustained notes without flutter.
A=430–450 Hz calibration
Calibrate the reference pitch from A=430 to A=450 Hz to match historical temperaments, alternate tunings, or another instrument in the room.
Tech
- Swift
- SwiftUI
- AUv3 extension architecture
- Real-time pitch detection
- iOS 17+ / macOS 15+
Tune inline, or as a standalone
Most tuners force a context switch: stop your session, open another app, tune, come back. Tuner AUv3 runs as an Audio Unit extension so you can drop it on a track in AUM, GarageBand, Cubasis, or Loopy Pro and tune without leaving your host. Need it outside a session? It also launches as a standalone app.
Calibration that matches your session
A440 isn't the only right answer. Whether you're matching a historical instrument tuned to A=432, sitting down with a piano at A=442, or playing along to a record at some other reference, the calibration slider (A=430–450 Hz) lets the tuner agree with the rest of the room instead of fighting it.
The detection engine
The pitch detector runs in the audio render path with the host's real-time priority, so it tracks what you actually play — plucked notes, sustains, and bends — without the lag and flutter you get from tuners that poll on a timer.