Before the hullabaloo starts, it was nice for Boston Baroque and Martin Pearlman to remember the younger Haydn with a performance of his 1771 Requiem, in a well-conceived concert of music by Mozart and both Haydns at Jordan Hall on Saturday. It's a not often sung masterpiece - with many interesting resemblances to Mozart's Requiem, which it obviously influenced - and still plenty of original genius, especially in the writing for solo voices.
There seems to be no hard evidence than Mozart heard Haydn's Requiem - apart, that is, from the two scores themselves, which abound in similarities: the opening chanted "Requiem," the declamatory "quam olim Abrahae." Mozart tightened, heightened, concentrated these ideas - bringing out melodic beauty and dramatic point - but he built his Requiem with Haydn's scaffolding.
Boston Baroque's 21-voice chorus is not going to have the impact of even a similarly sized choir singing in a great vaulted cathedral, and there were points - the opening phrase was one -when it was covered by the 37-piece orchestra. (When you're singing about death and eternity, you must be heard.) Still, the chorus sang with care, discipline, and pleasant tone.
The four soloists - Hyunah Yu, Ann McMahon Quintero, Kerem Kurk, and Kevin Deas - sang perfectly, at times exquisitely, and with the right degree of operatic personality to bring out the score's pathos and drama.
Two Mozart concert arias followed. "Basta vincesti. . . Ah non lasciarmi" (K. 295a) is a rarely heard early work showing Mozart's erotic infatuation with sopranos and their voices. Yu sang with deep feeling, a sparkling top register, and slightly swallowed vowels in her middle voice. The better known "Per questa bella mano" (K. 612), a dialogue - at times a duel - for bass and double bass, was sung by Deas, a bass-baritone of elegant phrasing and endless warm tone. Deborah Dunham played the all-but-impossible double-bass part in its original Viennese tuning.
The older Haydn was given the final word: one of the more neglected of his late "London" symphonies, No. 102 in B-major. It began with a patch of poor intonation in strings. By the Finale, however, the orchestra had its usual shine and sparkle and delivered the final witty strokes with polish.