Electronic Music No.19 by William Lennox consists of 5 compositions No.19a.19b,19c,19d and 19e. These compositions range in the duration from 12 to 20 minutes.

Though many of the composers pieces involve technical and related developments, these compositions are mainly a consolidation of earlier work and are more specifically concerned with pure musicality and a broadening of the expressive range of the medium.

In concerts these pieees make a light relief to more extensive compositions.