On April 21 and 22, 1999, Metallica recorded two performances with the San Francisco Symphony conducted by Michael Kamen, who had previously worked with producer Rock on "Nothing Else Matters". Kamen approached Metallica in 1991 with the idea of pairing the band's music with a symphony orchestra. Kamen and his staff of over 100 composed additional orchestral material for Metallica songs. Metallica wrote two new Kamen-scored songs for the event, "No Leaf Clover" and "-Human". The audio recording and concert footage were released in 1999 as the album and concert film "S&M". It entered the "Billboard" 200 at number two and the Australian ARIA charts and Top Internet Albums chart at number one.