A master is a term used by a record label to refer to a sound recording fixed in tangible form and from which all subsequent copies of the sound recording are made.
The New Formula for Success in the Music Business
The old method of promoting a new act in the music business was for a record company to invest at least $500,000 in studio time with a good producer, the cost of a good video, the advertising budget, and the cost of the first promotional road tour.