Patent ID: 7615702
Filing Date: 2009-11-10
Classification: G10H

Abstract:
1. A method for detecting a tempo and phase of a piece of music available in digital format, comprising: a. approximating the tempo (A) of the piece of music by means of a statistical evaluation (STAT) of the time intervals (Ti) between rhythm-relevant beat information in the digital audio data (Ei); b. approximating the phase (P) of the piece of music with reference to the position of the beats in the digital audio data within the time grid of a reference oscillator (MCLK) oscillating at a frequency proportional to the tempo established; c. successively correcting the established tempo (A) and phase (P) of the piece of music with reference to a possible phase shift of the reference oscillator (MCLK) relative to the digital audio data by evaluating the resulting systematic phase shift and regulating the frequency of the reference oscillator in proportion to the phase shift established.