Claviorganum

Under a Claviorganum is defined as a keyboard instrument, the harpsichord and pipe organ is at the same time. The organ is then used as frame for the harpsichord and corresponds in magnitude of a chamber organ.

Construction and history

These instruments may have two manuals, with the organ work can allude to the lower manual. At the same time register the harpsichord can be played by this manual, if it is a two-manual harpsichord. There are also Claviorgana with only one manual. The organ work often features in bass and treble split register.

The Claviorganum is attested since the mid-15th century, but most of the instruments obtained to date are no longer playable. End of the 18th century was also the rare combination of a square piano with a small organ.

Instruments received

The Salzburg Claviorganum 1591

In Salzburg there is a Claviorganum, which Joshua Pockh built in 1591. After a restoration in the years 1972-1974, the instrument is playable again. The single-manual instrument has a manual range of CDEFGA -f ³ and has three tabs:

• Spinet 8 ' ( undivided )
• Regal 8 ' ( division expanded bass / treble at d ¹ / dis ¹, only up to the sound of a ², short open resonators)
• Flute 4 ' (pitch bass / treble at d ¹ / dis ¹, Gedackt maple )

The shelf is behind a flap and can optionally be played with flip closed or open. The wind is supplied by two five-fold wedge bellows, which are drawn up with cords. The wind pressure is 80 mm WS. The mood is mean- with a ¹ ≈ 466 Hz

From the spinet, the webs, the soundpost and the cornice are received, the missing parts were built as part of the restoration. The shelf was missing and was built as part of the restoration. The flute is almost completely preserved.

Swell

• Case text of the LP The Claviorganum. harmonia mundi, 1987, HM 823 A.