Beethoven: Symphony No 9,inD minor (Choral) Beethoven's mightiest symphony on the last-but-one night of the Henry Wood Proms season - a tradition that remains unchanged since Sir Henry's day. BBC2 joins with Radio 3 in stereo and quadraphony to relay The Ninth live from the second half of tonight's concert at the Royal Albert Hall. Heather Harper (soprano) Helen Watts (contralto) Robert Tear (tenor) Raimund Herincx (baritone) London Philharmonic Choir London Philharmonic Orchestra leader DAVID NOLAN conductor Bernard Haitink Introduced by CORMAC RIGBY Sound VIC GODRICH and GEOFFREY TIMS Lighting JOHN WILSON Producer RODNEY GREENBERG