BEAT DETECTION AND ENHANCEMENT

摘要

A system encourages experimentation with audio frequency and speaker technologies while causing an inanimate figure to appear to dance. The system applies a bandpass filter to an incoming audio stream (e.g., in a low frequency bass band). The system monitors the magnitude of the audio content in a frequency band of interest. When an amplitude peak or other threshold magnitude is detected, a controller injects a short pulse (e.g., 3 cycles) of a sub-audible low frequency sine wave to a platform. Preferably, the sub-audible low frequency sine wave is at a resonance frequency of the platform to maximize its movement. The figure is positioned on the platform and appears to dance to the beat of the music.

主权项

1. A system comprising:
a receiver to receive an audio signal; and a controller to detect a magnitude of the audio signal, and in response, to generate a sub-audible signal that is substantially coincident with the detected magnitude.