The key compass is as follows:
C D E F – d³ 49 notes. There
is a short, broken bass octave, with the E key playing C,
F# playing D at the front and F# at the back, and G# playing
E at the front and G# at the back. There are split keys
for the enharmonic notes eb/d#, eb¹/d#¹, eb²/d#².
There are toe pedals for C D E F G A Bb B (short octave
arrangement, 8 notes).
The pitch is A415Hz. The tuning is quarter
comma meantone.
The natural keys are covered with cow bone
and the sharps are covered with ebony. There is a pair of
traditional wedge bellows, four-fold, with feeders, pumped
either by hand or by electric blower.