At 7 p.m. Sept. 4, at the Lakewood Theater, musician Tim Westergren, founder of Pandora.com, will be on hand to talk about his online radio service that uses play lists to cater to an individual subscriber's musical tastes, some of which might come as a surprise to the individual.

Founded in 2000, the Oakland, Calif.-based Pandora.com delivers to its clients, a unique musical experience based on the specific musical preferences of its clients. The service's the Music Genome Project, provides Pandora with a comprehensive analysis of the musical preferences of each of its members.

Highly trained music analysts in the Music Genome Project, use about 400 specific musical characteristics to understand the broad and deep range of songs, styles, and sound qualities that stimulate the individual subscriber's distinct musical tastes.

A subscriber enters a favorite musical act, song, or composer, for example, and the Pandora system makes recommendations — some perhaps unknown to the subscriber — of similar music based on characteristics such as melody, harmony and rhythm, instrumentation, orchestration, arrangement, lyrics, and vocals, according to the Pandora Web site.