LAVIGNAC, Albert and LAURENCIE, Lionel de la. Encyclopedia of music and conservatory dictionary. Published in Paris by Librairie Delagrave between 1921 and 1931. 11 volumes in-4, brown half-chagrin, cold-framed ribbed spines, double gilt framing to entrenerfs, one adorned with a lyre surrounded by a laurel wreath, gold lettering on brown leather, publisher's name gilt at foot, red head edges, bookmarks preserved. 3403 pp. ; 3436 pp. (continuous pagination), scores and numerous black illustrations in the text. Two-column printing. Spine sunned, minor rubbing. Some pages slightly foxed in the margins, rare foxing on paper and edges. Monumental musical encyclopedia published by Albert Lavignac (founder and principal author) and Lionel de La Laurencie (scientific director and editor). It consists of two parts: the first, in 5 volumes, offers a chronological and biographical history of music; the second, in 6 volumes, deals with technique, aesthetics and pedagogy (auditory physiology, instrumental technique (winds, percussion, strings), orchestration, liturgical music, aesthetics, music education). The course is broken down as follows: - Part I: History of music (Volume I: Antiquity and the Middle Ages; Volume II: Italy and Germany; Volume III: France, Belgium, England; Volume IV: Spain, Portugal; Volume V: Other countries). - Part Two: Technique - Aesthetics - Pedagogy (Volume I: Trends in music, General technique; Volume II: Vocal and auditory physiology, Vocal and instrumental technique; Volume III: Instrumental technique (wind instruments, percussion instruments, string instruments, automatic instruments); Volume IV: Orchestration, Liturgical music of different faiths; Volume V: Aesthetics; Volume VI: Pedagogy, Schools, Concerts, Theaters). A good, homogeneous and complete set in 11 volumes for this landmark work of early 20th-century French musicology.