Anthony Newman's once-controversial fast tempi are now commonplace among scholarly early-music performers. But Newman has always had unusual performing ideas; he was the first American to record the Brandenburg Concerti with one instrument per part, incorporating period instruments and conducting them from the harpsichord, now standard practice. He also released the first recordings of Beethoven piano concerti on fortepiano and period instruments that made use of Beethoven's controversial metronome markings. Lest Newman sound like an early-music purist, there is also Newman the 20th-century composer and improviser, so thoroughly modern and avant-garde that no less a contemporary music figure than Lukas Foss commissioned a symphony from him, which Foss premiered last Easter in Milwaukee. But it is still with the music of Bach that Newman is primarily associated, and his special way with that composer will be very much in evidence during his recital in Ravinia's second annual fall series. Handel and Mozart are also on the program. Tonight, 8 PM, Bennett Hall, Ravinia Festival, Green Bay and Lake Cook Rds., Highland Park; 728-4642.