Orphica

The orphica is a portable piano invented by Carl Leopold Röllig in the late 18th century.

Like a guitar, the orphica could be held on a shoulder strap, thus being an early forerunner of the modern keytar.

Among the few composers writing for the orphica was Ludwig van Beethoven.

According to a letter of Beethoven's friend Franz Gerhard Wegeler from December 23, 1827, Wegeler had 2 Stückchen für die Orphica, die Bhven für meine Frau componirte ('2 small pieces for the orphica which Beethoven composed for my wife').

51, formerly erroneously titled Leichte Klaviersonate.