It’s not entirely a goodbye, but it is the end of an era. One of Seattle’s most distinct music festivals, Freakout Festival, will not return this fall. In the interest of preservation, organizers of the nonprofit fest are shifting resources to produce a series of one-off shows at Seattle clubs instead. Over the last 13-plus years, Freakout sprouted from Capitol Hill house parties that Acid Tongue singer/guitarist Guy Keltner and his friends used to throw to a full-blown Ballard takeover, filling the neighborhood stages with a singular mix of local and international bands — even spilling over into Fremont clubs in recent years. In that time, Freakout launched an offshoot record label, a sibling spring festival and became a bona fide nonprofit organization championing underground music and border-defying cultural exchange. So, in the grand scheme of things, what’s one more evolution for the DIY music lovers already accustomed to reinvention?…