Bach's numbers: compositional proportion and significance

In eighteenth-century Germany the universal harmony of God's creation and the perfection of its proportions still held philosophical, moral and devotional significance. Reproducing proportions close to the unity (1:1) across compositions could render them beautiful, perfect and even eternal. Using the principles of her groundbreaking theory of proportional parallelism and the latest source study research, Ruth Tatlow reveals how Bach used the number of bars to create numerical perfection across his published collections, and explains why he did so. The first part of the book illustrates the wide-ranging application of belief in the unity, showing how planning a well-proportioned structure was a normal compositional procedure in Bach's time. In the second part Tatlow presents practical demonstrations of this in Bach's works, illustrating the layers of proportion that appear within a movement, a work, between two works in a collection, across a collection and between collections.

Title from publisher's bibliographic system (viewed on 08 Mar 2016).

Bach's numbers -- Symmetry, proportion and parallels -- Unity, proportions and universal harmony in Bach's world -- Bars, compositional planning and proportional parallelism -- Three collections for strings -- Four in two collections for keyboard -- Two further collections for keyboard -- Two small late collections -- Two large late collections -- Collections of concertos -- Collections of organ works -- Great passions and cantatas -- Festive cut-and-paste projects : masses and oratorios -- Lost blueprints.