More than 700 music-techie geeks will convene today for the SF MusicTech Summit. The sixth annual event at Hotel Kabuki in SF aims to help musicians, producers, promoters, and anyone else to understand how technology impacts their careers. Speakers include Ben Folds, San Francisco Symphony's Michael Tilson-Thomas, Pandora Radio’s Tim Westergren, LiveNation’s Noah Maffitt, and many others. Session topics include "The Future of Musical Instruments," "Rebirth of Video," "State of Webcasting," "Threats to San Francisco Nightlife," "Machine Listening," and the "Resurgence of Analog Synthesizers." 9 a.m.-6 p.m., $500.