BRIAN DRAKE, French horn, has been a member of the Los Angeles Philharmonic since 1979. A graduate of the Eastman School of Music, Mr. Drake has also played with the Rochester Philharmonic, the Rochester Chamber Orchestra, and the Niagara Falls Philharmonic. He is active in chamber music and is a regular participant in Philharmonic New Music Group concerts. In addition to private studio instruction, he has taught on the faculties of California State University at Los Angeles and the Los Angeles Philharmonic Institute.