Chromtuner Tune any instrument with studio-grade precision in milliseconds

Chromtuner: Native Chromatic Tuner for Mac

Chromtuner delivers studio-grade tuning precision directly on macOS with ±1¢ accuracy and sub-50ms latency. Unlike browser-based alternatives, this native app connects directly to Core Audio, preserving your full sample rate and eliminating the jitter and downsampling that compromise tuning reliability.

Product Highlights

• Native Core Audio Integration: Direct access to USB audio interfaces at full sample rate with zero audio rerouting or sandbox delays
• YIN Pitch Detection: A0 to C8 range with ±0.14¢ accuracy on pure tones and ±1¢ real-world precision, plus octave-error correction for plucked strings
• Dual Display Modes: Choose between a responsive 31-LED bar meter or a Peterson-style rotating strobe with hard ±0.5¢ deadband
• Historical Temperaments: Eight tuning systems including Equal, Just, Pythagorean, Meantone, Werckmeister III, Kirnberger III, Vallotti, and Young II
• 15 Instrument Presets: Guitar, bass, violin, viola, cello, double bass, ukulele, mandolin, and banjo with capo support through fret 11
• Menu-Bar Convenience: 360px popover launches in under 200ms for quick tuning between takes
• Complete Offline Operation: No network connections, no telemetry, no account required—audio never leaves your Mac
• One-Time Purchase: $6.99 with lifetime 1.x updates, no subscription, universal binary for Apple Silicon and Intel

Use Cases

• Studio Recording: Achieve precise intonation for multi-tracking with reference tones and custom A4 calibration (349.0–499.9 Hz)
• Live Performance: Menu-bar mode keeps tuner accessible without cluttering your screen; always-on-top option for stage visibility
• Historical Performance: Period instruments and early music repertoire using authentic temperaments with movable tonic
• Transposing Instruments: B♭ trumpet, A clarinet, and capo'd guitars with ±11 semitone transpose and concert pitch display
• Practice and Teaching: Clean sine reference tones with keyboard shortcuts for ear training and student instruction

Target Audience

Musicians, producers, and educators using macOS who demand professional tuning accuracy without compromises—particularly guitarists, bassists, bowed string players, and early music specialists seeking reliable offline performance with audio interface support.