Assertion: clavichord's range | /r/CapableOf | expand 4 or 4 1 / 2 octaves
Facets:
value: in the 16th century
type: TEMPORAL
value: gradually
type: MANNER
value: from a single octave
type: OTHER
value: for some early organs
type: OTHER
Source sentences:
text: The range of the keyboard gradually expanded from a single octave for some early organs to 2 1 / 2 or 3 octaves in the 15th century and 4 or 4 1 / 2 octaves in the 16th century.