Ed Volker became the shaman of the New Orleans “Fishhead” subculture back in the 1970s when he described his band’s style as “Fishhead music.” Now he is bringing it all back home at Jazz Fest 2014. Volker will perform with Joe Cabral on baritone saxophone and Michael Skinkus on percussion as Trio Mollusc, and will resume his chair presiding over those Meistersingers of the wrong road, New Orleans’ once and fu...