in Paris (1780). Existing
virginals made by the Ruckers family are rectangular (one is six-sided) with the
keyboard positioned either to the left (
spinet) or right (
muselar) of centre and a single set of
strings running parallel to the long side.
Spinetten had their plucking point near the end of the string, while
muselaars had a plucking point close to the middle of the string; the difference in sound between the two is easily audible. The pitch of the instrument varied according to its size; the largest sounded at the standard pitch of the time, something like a'=415
Hz, while smaller virginals were pitched a tone, 4th, 5th, 8ve or a 9th higher. Some virginals were built as double instrument, with a normal-pitch instrument combined with one pitched an octave higher; this was known as 'the mother with the child', marked 'M' (
Moeder) and 'k' (
kind) as the smaller instrument was normally stored in a space beside the keyboard of the larger. The actions combined when the octave instrument was fitted on top of the regular one, enabling the musician to play both at once. They occasionally built other compound instruments, fitting a virginal into the empty space left by the harpsichord's bentside. Both single and double manual harpsichords made by the Ruckers family had the disposition 8' 4', with each
keyboard having a set of jacks for each set of strings. The standard compass of the Ruckers keyboard is from short octave C/E to c
or d. Double manual harpsichords had their keyboards uncoupled and aligned to sound a 4th (occasionally a 5th) apart, with the upper manual at standard
pitch and the lower pitched below it; when each manual was being used the jacks of the other manual were disengaged. The Ruckers double manual harpsichord thus worked as two instruments in one, pitched a 4th apart. Later two-manual harpsichords keyboards had the two sets of strings tuned together or
antiphonally at the same pitch, for
timbral contrasts. Variations of the standard models were sometimes produced for export to France or England; there are single manual harpsichords with
chromatic basses (rather than the short octave) down to C, probably intended for England, and double manual harpsichords with a lower-manual range of GG to c
and an upper manual range of F to f, produced for France, the lower manual being at standard pitch and the upper a 4th below, reversing the usual pitch arrangement. The lower manual range of these instruments suits the music of contemporary French harpsichord composers such as
Chambonnières and
Louis Couperin, while the upper manual range is close to early French organ design. When constructing an instrument, a number was written on the case and many of the parts of the action, along with a
serial number depending on the model. This has let researchers learn much more about undated instruments and helped them estimate the rate of production—calculated at up to 35 to 40 instruments per year. Decoration of an instrument was as careful and elaborate as its construction; repeating
Renaissance patterns were block-printed onto paper and placed inside the keywell and around the inside of the case above the
soundboard. Large
Latin mottoes were printed similarly on a wood-grained paper on the inside of the lid. Alternatively, the lid was painted by artists such as
Rubens and
Brueghel. The exterior was painted in imitation of marble or huge
jewels held by iron
strapwork. The rose in the soundboard is surrounded by a painted wreath of
flowers and other
flora and
fauna in
tempera. The roses used by all members of the Ruckers family show an angel playing a harp, with the initials of the builder on each side of it; the date was found either on the soundboard or the wrest plank. ==Legacy and the French practice of
ravalement==