"I don't care what it'd be as long as it's not that ... gangsta rap," said Brink, 39, who has been riding the subway since 1983.

In a deal with New York-based media company The Rail Network, MARTA will get a cut of the revenue from the advertising on the televisions and the on-train music channels. MARTA stands to make $20 million over the next decade, said David Lane, chief executive officer of The Rail Network.