In many ways, the quality of what people hear — how well the playback reflects the original sound— has taken a step back. To many expert ears, compressed music files produce a crackly, tinnier and thinner sound than music on CDs and certainly on vinyl. And to compete with other songs, tracks are engineered to be much louder as well.

In one way, the music business has been the victim of its own technological success: the ease of loading songs onto a computer or an iPod has meant that a generation of fans has happily traded fidelity for portability and convenience. This is the obstacle the industry faces in any effort to create higher-quality — and more expensive — ways of listening.

“If people are interested in getting a better sound, there are many ways to do it,” Mr. Zimmer said. “But many people don’t even know that they might be interested.”

Take Thomas Pinales, a 22-year-old from Spanish Harlem and a fan of some of today’s most popular artists, including Lady Gaga, Jay-Z and Lil Wayne. Mr. Pinales listens to his music stored on his Apple iPod through a pair of earbuds, and while he wouldn’t mind upgrading, he is not convinced that it would be worth the cost.

Image Mario Suazo, 11, listens to his iPod at the Port Authority Bus Terminal. Credit... Joshua Bright for The New York Times

“My ears aren’t fine tuned,” he said. “I don’t know if I could really tell the difference.”

The change in sound quality is as much cultural as technological. For decades, starting around the 1950s, high-end stereos were a status symbol. A high-quality system was something to show off, much like a new flat-screen TV today.