Two new musical documentaries begin showing tonight at the Siskel Film Center. There's Moog, an appreciation of musician and inventor Robert Moog. (You know, the Moog synthesizer guy.) And there's also a documentary about Christian rock music, Why Should the Devil Have All the Good Music? (This film was recently seen at this year's Chicago Underground Film Festival.) The directors of this film, Heather Whinna and Vickie Hunter, will be at the Film Center for audience discussion after tonight's screening. And if that isn't enough music for you, tonight's Film Center schedule also includes a screening of that hard-hitting look at the Hollywood music scene, Beyond the Valley of the Dolls. So now all you fans of The Carrie Nations have something to do tonight!