Live in Studio A today: the Brazilian classical guitarist Fabio Zanon. Mr. Zanon will be in the Baltimore area this weekend to perform at the Kaplan Concert Hall on the campus of Towson Univerity Saturday night from 8-10 pm. His performance opens the annual concert series presented by the Baltimore Classical Guitar Society.Fabio Zanon will also be teaching a free master class for guitarists, open to the public, at the Peabody Institute on Sunday, Oct. 28th beginning at 10 am.