Note 8 — Chapter I
Reading edition
It is important to distinguish between sonata and sonata-form. The first movement of a modern sonata is usually in sonata-form; but there are sonatas (Beethoven, Op. 26, etc.) which contain no such movement. Sonata-form, as will be shown later on, has been evolved from old binary form. By sonata is understood merely a group of movements; hence objection may certainly be taken to the term as applied to the one-movement pieces of Dom. Scarlatti, which are not even in sonata-form.