AutoRhythm: A music game with automatic hit-time generation and percussion identification

摘要

This paper describes a music rhythm game called AutoRhythm, which can automatically generate the hit time for a rhythm game from a given piece of music, and identify user-defined percussions in real time when a user is playing the game. More specifically, AutoRhythm can automatically generate the hit time of the given music, either locally or via server-based computation, such that users can use the user-supplied music for the game directly. Moreover, to make the rhythm game more realistic, AutoRhythm allows users to interact with the game via any objects that can produce percussion sound, such as a pen or a chopstick hitting on the table. AutoRhythm can identify the percussions in real time while the music is playing. The identification is based on the power spectrum of each frame of the recording which combines percussions and playback music. Based on a test dataset of 12 recordings (with 2455 percussions of 4 types), our experiment indicates an F-measure of 96.79%, which is satisfactory for the purpose of the game. The flexibility of being able to use any user-supplied music for the game and to identify user-defined percussions from any objects available at hand makes the game innovative and unique of its kind.