CONCERTOS FOR RECORDER, STRINGS AND CONTINUO BY VIVALDI, SAMMARTINI, TELEMANN AND HANDEL. Michaela Petri, recorder. Iona Brown conducting the Academy of St. Martin-in-the-Fields. Philips compact disc 400 075. CONCERTOS FOR RECORDER BY VIVALDI, MARCELLO, TELEMANN AND NAUDOT. Petri, recorder. Kenneth Sillito conducting the Academy of St. Martin-in-the-Fields. Philips compact disc 412 630. CONCERTOS FOR RECORDER BY VIVALDI, CORELLI, BIGAGLIA, BONOCINI, SAMMARTINI AND MARCELLO. Petri, recorder. George Malcolm, harpsichord. Philips compact disc 412 632. The CD sound is particularly kind to the recorder, and this ancient wind instrument often eclipses strings that sound a bit distorted. Petri makes the most of the situation with stunning virtuosity and perfect control. Nothing seems hurried no matter how fast the pace because she always emphasizes musicianship over everything else. The music, especially Naudot's Concerto in G, is ingratiating.