Pedal clavichord

While clavichords were typically single manual instruments, they could be stacked to provide multiple keyboards.

An interesting case is made by Harald Vogel that Bach's "Eight Little Preludes and Fugues", now thought to be spurious, may actually be authentic.

The keyboard writing seems unsuited to organ, but Vogel argues that they are idiomatic on the pedal clavichord.

As Williams (2003) also notes, the compass of the keyboard parts of Bach's six Organ Sonatas, BWV 525–530 rarely go below the tenor C, so could have been played on a single manual pedal clavichord, by moving the left hand down an octave, a customary practice in the 18th century.

Various modern copies have been made of surviving pedal clavichords, such as the one in the Instrumenten-Museum in the University of Leipzig built in the 1760s by the organ-builder Johann David Gerstenberg from Geringswalde in Saxony.