Complex sentence: Batio is (self-taught) ambidextrous, able to play two guitars at the same time either in synchronization or using separate harmonies or even playing completely different parts at once, as shown when he plays his famous Double-Guitar.
Split into simpler sentences: Batio is (self-taught) ambidextrous, able to play two guitars at the same time either in synchronization or using separate harmonies. This includes playing completely different parts at once, as shown while playing his famous Double-Guitar.