The Bachelor’s thesis at hand aims at analyzing the double-pedal harp No 3643, built by Erard between 1820 and 1825. Ragnhild Kopp-Mues bought the harp during her studies (1962–1968) for 50 DM. It had been found on an attic, the former owner is unknown.
Originating from the diocese of Bale, the founder of the Erard company, Sébastien Erard, is born in 1752. Togetherwith his older brother Jean-Baptiste, he leaves to Paris at around 1770. They found their first manufacture for piano fortes. In 1790, Sébastien settles down in London and establishes a local branch for manufacturing harps mainly. In 1814, he hands over the workshop to his nephew Pierre (Orphee) as CEO, who runs both companies after Sébastien’s death.
In general, the development of the harp starts with a simple diatonic harp, continuing with a chromatic and hook harp, and ending with a single and double pedal harp.Regarding the construction of a harp, the soundbox is the most complex wooden part. It is composed of a bent corpus and a multiple-part soundboard. Glue is used for the major compounds between soundbox and soundboard, partly locked by metal pins. Except the linkage between column and neck, all other parts of the harp are mechanical plug and screw connections. The mechanics for retuning the strings is made of metal, activated via the pedals. Pedal bar and lever transfer the movement of the pedal to the axis of the forks that start to rotate. Thismovement pushes the pins on the forks against the strings, thereby pinching them off so that they sound a halftone higher.
The harp owned a so-called „swell“, thus enabling to mechanically close the soundholes with flaps. The mechanism, was activated via pedals, was located in the inner part of the corpus. Due to a lack of functionality, this mechanism was removed in this harp like it was done in most instruments during that time. Modern harps use soundholes in the soundbox instead.
The harp is covered by up to four historical layers. The first is varying on the different parts: The corpus is black, with golden lines on the edges. On top of several layers of black lacquer, a transparent finish is used. For the soundboard, only one layer is chosen.
The inner edge of the soundholes only start with the second layer. As it can be identified on the shell above a black ground cover the frame border of the soundholes and the cannelures of the column are golden-plated and topcoated with transparenten, protective lacquer. Head and foot of the column as well as the pedal box show a white base coat and a multi-color layer for f the metal leave. On top, leaf gilding and a transparent, protective lacquer follow. Samples of pedal box and upper pedal cover show the same number and distribution of layers, but differentappearances wherefore they do not allow a coherent interpretation.
The bass strings (in comparison to c2 as well as the Pythagorean diapason) are shortened, and prolonged in discant. With regard to tempering, no tendency can be identified.
Within the last 200 years, the harp has undergone many changes and revisions.
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The Bachelor’s thesis at hand aims at analyzing the double-pedal harp No 3643, built by Erard between 1820 and 1825. Ragnhild Kopp-Mues bought the harp during her studies (1962–1968) for 50 DM. It had been found on an attic, the former owner is unknown.
Originating from the diocese of Bale, the founder of the Erard company, Sébastien Erard, is born in 1752. Togetherwith his older brother Jean-Baptiste, he leaves to Paris at around 1770. They found their first manufacture for piano fortes. In...
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