The nationwide noise scene is a thriving threat that’s been bubbling beneath the ever-calming surface of “indie” rock for some time now with increasing intensity, and locally, Jim Marchbanks’ JamSessions series has served as a fittingly disorganized support center for the experimental musicians that fall under the umbrella term “noise.” Sewing together splinters of industrial, jazz, avant-garde, ambient and other acquired-taste styles, JamSessions 9 promises DJ sets by Mochipet, Kudjo and Dis-trust, along with band sets by Moira Scar, Shrew Florist, SkarSkate, Ashkira and Pathos. Surrender your central nervous system on Friday, June 4, at the Phoenix Theater. 201 E. Washington St., Petaluma. 8pm. $8. 707.762.3565.