Bach : Chorale Harmonization and Instrumental Counterpoint, Paperback by Boyd, Malcolm, ISBN 1871082722, ISBN-13 9781871082722, Like New Used, Free shipping in the US Following methods known to have been adopted by Bach himself, the exercises provided in chorale harmonization are graded in such a way as to encourage the student to develop both technique and imagination within a closely-defined framework. The instrumental counterpoint section is based on Bach’s two-and three-part Inventions. By close analysis the author helps the reader to recognize the procedures Bach adopted in various musical situations. The exercises are taken largely from Bach’s keyboard works.