[CHOQUEL (Henri Louis)]: - La Musique Rendue Sensible par la Mechanique ou Nouveau System pour apprendre faciilement la Musique soi-meme. Ouvrage Utile et Curieux. Nouvelle Edition.,

A Paris, Chez Christope Ballard..., 1762. 8vo, 193 x 112 mms., pp. [vi], 19 [20 blank], 213 [214 "Attribution de la Charge," 215 - 217 errata and privilege], folding engraved plate, numerous musical illustrations in text, recently rebound in quarter red morocco, marbled boards, title blocked in gilt on spine. A very good copy. Henri Louis Choquel (1702 - 1767) published the first edition of this work in 1759, and this second edition has a new preface. "In 1762...Choquel...described his new invention, a pendulum-metronome, and its uses in La Musique Rendue Sensible par la Mechanique; Choquel emphasized that the instrument was created to fulfill an important function, namely,',,, to learn to beat time with the precision it demands.' Choquel's time-beating procedures were identical to those of his contemporaries Montéclair, Dupont, and Démotz; he was in addition the first to advocate the use of a mechanical device to enable a student to learn to trace gestures precisely... Choquel's instrument was the earliest mechanical device to correlate time-beatiings physically with musical activity" (Elliott W. Galkin: A History of Orchestral Conducting: In Theory and Practice (1988).

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