Semenya McCord--plays jazz. In the Faneuil Hall marketplace. At noon on Thursday.

MIT Chapel Series--the Mannheim Quartet performs Pleyel, Rossini and Viotti. In the MIT Chapel at noon on Thursday.

The Boston University Wind Ensemble--with flutit Alan Weiss performs Copland, Bassett, Vaughan Williams, Noon and Griffes. At the Boston University School for the Arts at 685 Commonwealth Ave. in Boston. Call 353-3345. At 8 p.m. Thursday.

The Boston Conservatory Orchestra--with Ronald Feldman, conductor, performs Beethoven's Symphony No. 6 and Wagner's "Siegfried-Idyll." In Seully Hall, 8 The Fenway, at 8 p.m. on Friday.

The MIT Musicians Behind-the-Desk Series--performs Mozart, Brahms, Faure, Schumann and Rossini. In Killian Hall at MIT at noon on Friday.

Maury Rosenberg and the Hypnotic Clambake--In the Faneuil Hall marketplace. At noon on Friday.

The Boston Symphony Orchestra--with Seiji Ozawa, conducter, and Janis Taylor, mezzo-soprano, performs Beethoven's Symphony No. 8 and Prokofiev's "Alexander Nevsky." At the Boston Symphony Hall at 2 p.m. on Friday and 8 p.m. on Saturday.

Suzanne Perel--vocalizes in the Faneuil Hall marketplace. At noon on Saturday.

MIT Guest Artist Series--presents the Audobon String Quartet performing Mozart and Mendelssohn. In the Kresge Auditorium at MIT at 8 p.m. on Saturday.

Jean Luc Ponty--performing West Africa's music. At the Berklee performance center. Tickets at all Ticketmaster outlets. At 7:30 p.m. on Saturday.

The Boston Conservatory Performance Series--presents pianist Michael Lewin performing Debussy, Glazunov and Liszt. In Seully Hall, 8 The Fenway, at 8 p.m. Saturday and 3 p.m. Sunday.

John Gibbons, harpsichord--a solo recital on the Hemsch harpsicord at the Museum of Fine Arts. At the Museum of Fine Arts at 465 Huntington Ave., Boston. At 3 p.m. on Sunday.

MIT Musicians Behind-the-Desk Series--presents pianist Laurie Collier performing Beethoven, Stravinsky and Mendelssohn. In Killian Hall at MIT at noon on Wednesday.