Jamey Aebersold is an American jazz saxophonist and music educator. His “Play-A-Long” series of instructional book and CD collections, using the chord-scale system, the first of which was released in 1967, are an internationally renowned resource for jazz education. As of 2013, 133 of these collections have been published by Aebersold, who taught musical improvisation at the University of Louisville for a number of years.