A DPD is another name for a digital download and refers to a transmission to the purchaser that allows them to download music to use repeatedly and indefinitely.
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.