Ever since the Wednesdays at the Square schedule was released I have been psyched to hear Happy Jack Frequency.  They are opening for the Dirty Dozen Brass Band this evening.  When I tell people this, they inevitably ask, who, or what, is the Happy Jack Frequency?  The answer may surprise you.  We watched James Martin, the brains behind the band, grow up right before our very eyes.  He began playing with Troy “Trombone Shorty” Andrews in Orleans Avenue when he was in his early teens.  A powerhouse saxophonist from the first time I heard him, Martin was Shorty’s on stage foil as well.  Now all grown up, he left Orleans Avenue over a year ago to pursue his own muse.  The tunes that his new band plays are very different than the funky rock of Orleans Avenue.  They have a poppy  modern rock sound with plaintive vocals and catchy melodies.  You can preview them at happyjackfrequency.com.