GENERAL KNOWLEDGE: Which South African word means 'segregation?

Questions

- A medley of popular tunes.?

- A Wagnerian term for opera, which he felt to be inadequate. This term describes Wagner's new concept of the leitmotif and the fusing of scenery, costume, libretti, music and drama into a new art.?

- A term describing (from the 1960's) dramatic works simpler than opera and suitable for the concert platform.?

(Fr., 'concrete music') - Music in which natural sounds (instrumental, vocal or other) were recorded on tape and then distorted, combined, etc. This term was coined by Peter Schaeffer in 1948 but it has largely been superseded by electronic music.?

(It.) - Change. Direction to the timpani player to change tuning or to the wind player to change instrument.?