As principal cellist of the Traverse City Philharmonic, Crispin Campbell plays to audiences ready for music by Brahms, Bach and Beethoven. That’s not what the audience will hear at the July 24 concert at The Homestead. Campbell and his cohorts, pianist Steve Stargardt and dobro player Joe Wilson, will be playing music familiar to fans of BB King, Antonio Carlos Jobim, Keith Jarrett, or down-home country music. Most of all with the improvisational flair and approach of jazz. Campbell says he started exploring improvisation around the year 2000. “I began creating my own music and teaching improvisation for string players,” he explains. “I’m really driven to not play the same way twice. That’s intriguing.”