Hockman, J.A., Wanderley, M.M., Fujinaga, I., 2009.

Real-time phase vocoder manipulation by runner's pace

This paper presents a method for using a runner's pace for real-time control of the time-scaling facility of a phase vocoder, resulting in the automated synchronization of an audio track tempo to the generated control signal. The increase in usage of portable music players during exercise has given rise to the development of new personal exercise aids, most notably the Nike+iPod system, which relies on embedded sensor technologies to provide kinematic workout statistics. There are also systems that select songs based on the measured step frequency of a runner. The proposed system also uses the pace of a runner, but this information is used to change the tempo of the music.