Rare is the drummer who is both influwntial and essential to a genre but Billy Cobham is just that in regards to jazz and consequently to music in general. He's performed with Miles Davis - displaying his ambidextrous drumming on classic recordings.This play-along package features selections from Spectrum where the individual instrument tracks are remixed so that the musician/student can play along in essence filling in for any key member of the London Jazz Orchestra with whom this project was recorded. The experience is one that Cobham describes as 'accessible yet challenging'.