Who is responsible for systematizing bowing strokes for the string section in an orchestra?

In the music of Ghana, what is the large, barrel-like drum that produces a deep tone?

a. Dagomba b. dondon c. gongon d. xylophone e. erhu

Which European nation's theaters were NOT fully wired for sound projection at the end of the 1930s?

A. Germany B. Great Britain C. France D. the Soviet Union