Mastering a six-string guitar is a daunting enough task on its own, but perfecting the art of playing an eight-string guitar—well, that’s just ridiculous, right? Mind-boggling jazz guitarist Charlie Hunter can usually be found playing bass lines, rhythm guitar and solos simultaneously on one of his custom-made, eight-string guitars. At the age of four, his mom packed him and his sister in a yellow school bus to head west, landing in Mendocino County. Their travels led them to Berkeley and, as they say, the rest is history. Watch the master at work on Friday, Dec. 9, at the Mystic Theatre. 23 Petaluma Blvd., Petaluma. 8pm. $21. 707.765.2121.