Chord Identifier is a visually aesthetic and musically accurate music theory companion designed with visual learners in mind. It listens to your real-time MIDI performance and uses a harmonic gravity engine to instantly identify and explain complex harmonies within their correct musical context. At its core, it is a chord identification tool that tells you what chord you're playing while being context-aware of what scale and key you're in.

The application offers multiple layout options including Dot Layout, traditional piano layout, and Guitar Fretboard layout with adjustable keyboard sizes (25, 49, 61, and 88 keys). It features Scale Mode with over 50+ scales that highlight in-key notes in pastel green and flag wrong notes in bright red. The app includes a combined MIDI and Audio Recorder that captures WAV audio and MIDI data, transpose options for semitones and octaves, and a metronome with tempo control, sound selection, and time signature settings.

Chord Identifier automatically detects scales after playing 30 notes and maintains chord history with contextual information. It offers chord search functionality, a waterfall MIDI player for importing and analyzing MIDI files, and a native synthesizer with 2 oscillators, noise OSC, ADSR, filter with LFO, reverb, delay, drive pad, oscilloscope, and spectrogram. Additional features include sticker customization, quiz mode for ear training, custom instrument creation with SFZ/SF2 support, dark mode, film grain effects, and sustain pedal/pitch wheel/modulation wheel support.

The application provides various customization options including reverb aura color selection, UI zoom (125%-200%), PC keyboard MIDI input, fixed velocity settings, sustain modes, accent color changes, and recording folder selection. It uses a humane naming approach for chords that prioritizes commonly used musician terminology over mathematically complex names.

Chord Identifier is designed for musicians, music learners, and songwriters who want to improve their music theory understanding and composition skills. It supports integration with DAWs through MIDI export and works with various MIDI keyboard sizes and controllers.