Piano Transcriber

Built with Flutter, this app captures piano audio from the microphone and automatically transcribes it to MIDI using on-device machine learning via TFLite. Currently uses Spotify's Basic Pitch CNN model as a starting point, with plans to upgrade to more accurate architectures — such as Google's Onsets and Frames (a hybrid CNN-RNN model designed specifically for polyphonic piano transcription) or newer transformer-based models, which leverage self-attention mechanisms to better capture long-range musical context and temporal dependencies, yielding significantly higher transcription accuracy. Features include a live waveform display during recording, background isolate transcription, a full-featured MIDI/WAV player with mini and full-player views, a falling-notes visualizer with an interactive piano keyboard, audio format toggling, playback scrubbing, recordings management with favorites and groups, and SoundFont-based MIDI synthesis. Supports iOS and Android with light/dark theming. Work in progress — core transcription accuracy and premium features are actively being developed.