Abstract: A method of making audio music selection and creating a mixtape, comprising importing song files from a song repository; sorting and filtering the song files based on selection criteria; and creating the mixtape from the song files sorting and filtering results. The sorting and filtering of the song files comprise: spectral analyzing each of the song files to extract low level acoustic feature parameters of the song file; from the low level acoustic feature parameter values, determining the high level acoustic feature parameters of the analyzed song file; determining a similarity score of each of the analyzed song files by comparing the acoustic feature parameter values of the analyzed song file against desired acoustic feature parameter values determined from the selection criteria; and sorting the analyzed song files according to their similarity scores; and filtering out the analyzed song files with first similarity scores lower than a filter threshold.

Abstract: A Music Wheel user interface or apparatus having a substantially flat surface area and being formed by a plurality of wheels stacked on top of each other. Each wheel can independently move in clockwise and anticlockwise directions. The face of each wheel displays relevant and fundamental information for musical instructions. Certain parts of the faces of certain wheels are cut out, or have windows, allowing the inscriptions of pitches or key tonalities letter, number, and symbol notes on the faces of the wheels at the bottom to be seen. The sizes of the wheels are ascending from top to bottom to allow the inscriptions on the rim of the wheels at the bottom to be seen. During operation, at least one wheel is stationary and three are movable. All moving parts can move independently of each other.