in New York), on the Internet (and recorded for a live album. The concert, featuring the band's 1966 lineup with the addition of David Gilmour of Pink Floyd on guitar and Arthur Brown (known for his hit ''Fire'') providing narration, will be broadcast live (at 4 P.M. Sorrow'' in its entirety for the first time at Abbey Road Studios in London. On Sunday, the reunited Pretty Things are to perform ''S. After the band settled out of court this year with several record labels for royalties and the rights to its catalogue, Snapper made a deal to repackage the group's past albums and record three new ones. Out of print for decades, the album is to be reissued on CD by Snapper Music.

''The album has never really had a proper release,'' Phil May, the band's singer, said from his home in London. But for a work of such importance - among the most interesting and ambitious albums of the 60's - ''S. Sorrow is born,'' the British band the Pretty Things entered the rock-and-roll history books in 1968 with what is generally acknowledged as the first rock opera. With the lyric ''From number three there came the cry, 'S.

Rock opera by the who