(MUSIC) To paraphrase William S. Burroughs, jazz is a virus, moving and mutating around the world. Every year, Earshot incubates them all, from straight-ahead local legends like Floyd Standifer and innovators like Marc Ribot to unexpected acts such as Konono No. 1 (a Congolese DIY electrified thumb piano ensemble) and the Gangbé Brass Band (a rollicking Benin-based brass ten-piece that boasts a euphonium player). For a preview of the first week of the festival, see The Score on page 64. (Various Venues, 547-9787. For a full schedule, see www.earshot.org.)