Online music service Last.fm will launch an HD multicast station for New York, Los Angeles, Chicago and San Francisco on October 5, CBS Radio announced today. The station’s content will revolve around Last.fm’s music charts generated by what the service’s 25 million monthly users are listening to. Additionally, in-studio performances and artist interviews will also be featured.

The new station will be heard on WWFS-FM (102.7 HD2) in New York, KCBS-FM (93.1 HD2) in Los Angeles, WXRT-FM (93.1 HD3) in Chicago and KITS-FM (105.3 HD3) in San Fransisco. Listeners can also tune in to Last.fm’s broadcast station online and on CBS Radio’s mobile applications. “Millions of people have helped create one of the best music discovery sites out there, and the information they provide us about their listening preferences will be at the core of everything we do on this new station,” said David Goodman, president of the CBS Interactive Music Group. “We believe this is exactly the type of programming that will help bring new listeners to the HD multicast frontier.”