Answer:
Traditional sub-Saharan African harmony is a music theory of harmony in Sub-Saharan Africa In traditional African music, scales are practiced and thought of as Homophonic polyphony occurs when two different melodies are harmonized in the (Karlson E. Hester and Francis Tovey use the same phrase to describe it).
1.) The Stylophone was accidentally invented in 1968 in Britain and production of the original model ran right into the early 80's
2.) Rolf Harris put the Stylophone on the map with his cheesy advertising and even gave handy techniques and lessons on television
