Patent ID: 8170702

Claim:
A method for selecting audio data, comprising: a pre-selection process including: providing mood space data representative of a mood space for classifying audio data, providing first audio data and generating a first mood space location within the mood space for the first audio data, providing second audio data and generating a second mood space location for the second audio data, and determining whether the second audio data is within a pre-defined neighborhood space around the first audio data by generating comparison data indicating a distance, in the mood space, between the first mood space location and the second mood space location; a detailed comparing process including comparing, based on frequency domain related features, the first audio data and the second audio data only when the comparison data from the pre-selection process indicates the second audio data is within the pre-defined neighborhood space, wherein a plurality of other audio data are compared with respect to the first audio data according to the pre-selection process and the detailed comparing process; and generating a play list based on the comparisons of the second audio data and the other audio data with the first audio data to include audio data thereof similar to the first audio data.