LH Tuner

The tuner reports pitch with a stated resolution of ±0.001 semitone, equivalent to ±0.1 cent. Cent deviation, a note-wheel display, and a needle meter provide complementary ways to judge whether a note is flat, sharp, or centered.

LH Tuner is designed for instruments including piano, acoustic and electric guitar, bass, strings, brass, woodwinds, and timpani. A microphone input-level display helps the player check whether the incoming signal is strong enough for stable pitch detection.

Concert A can be calibrated from A4 = 430 Hz to A4 = 450 Hz. Transposition support makes the tuner suitable for instruments and performance contexts where displayed and sounding pitch differ.

Equal temperament, Pythagorean tuning, and Just Intonation are available. The tone generator calculates note frequencies according to the selected temperament, allowing the app to serve as both a tuning tool and a reference for comparing interval systems.

The tone generator covers 20 Hz to 20,000 Hz with stated frequency precision to 0.01 Hz. Sine, sawtooth, triangle, and square waveforms provide different harmonic profiles for reference listening and pitch matching.

Two keyboard layouts are included. The Classical Keyboard follows a piano-keyboard model, while the Custom Keyboard allows a specific frequency to be assigned directly, including pitches outside a conventional note layout.

The Fine control adjusts a generated note from −50 to +50 cents and displays the resulting frequency in hertz. Initialize returns the offset to zero. Rotary, horizontal, and linear control modes allow the knob interaction to match different playing and editing preferences.

Attack and release controls shape the amplitude envelope of generated tones. A noise gate with an adjustable threshold helps reduce unwanted background input during tuning.

Volume, octave selection, key-number display, keyboard-type shortcuts, output-level indication, automatic saving of changes, and initialization controls support repeated practice and setup.