Benny Evangelista of SFGate’s Tech Chronicles reports that an experiment allowing listeners to vote on songs has doubled the ratings of alternative rock Live 105 during a two-hour period on Sunday nights.

While Sunday nights don’t have the audience of morning drive, “it got everyone’s attention,” said Doug Harvill, gm of CBS Radio’s six SF stations.

Harvill said it’s something like the “Casey Kasem’s American Top 40 of the digital generation.”

Jelli Inc., the San Mateo startup that provided the software for listeners to vote for their favorite songs, hopes to syndicate it in other markets.