Fall 2023 – present
Evaluator Sound
An app that helps musicians practice more effectively by listening to their playing. Spectrogram analysis and multi-modal transformers detect extra, missed, and wrong notes and return an annotated score, building on our Polytune error-detection model (AAAI 2025).

Evaluator Sound helps musicians practice more effectively by listening to their playing. It uses spectrogram analysis and multi-modal transformers to tell correct from incorrect playing, detecting extra, missed, and wrong notes, and returns an annotated score so the player knows exactly what to correct.
The error-detection model, Polytune, takes audio as input and outputs an annotated music score. It was published at AAAI 2025.
Publications
Detecting Music Performance Errors with Transformers, AAAI 2025.
Team
- Benjamin "Ben" Shiue-Hal Chou (Lead)