FARMINGTON — Mid Maine Youth Orchestra, which is gearing up for its 34th concert season, has connections to its very first season. MMYO was founded by Dennis Hayes and Karen McCann, former music teachers at Mt. Blue High School. Auditions for middle and high school students are held in October. Those selected have a couple of rehearsals, then break for two months. In January, twice weekly rehearsals resume. One is held at Mt. Blue, the other at Messalonski High School in Oakland.