Assertion: double bass's string | /r/HasProperty | tuned down two half-steps
Facets:
value: for simple barred power
type: PURPOSE
value: for fifth chords
type: PURPOSE
Source sentences:
text: -D tuning (where the lowest string is tuned down two half-steps for simple barred power or fifth chords) are rare in modern classical guitar music, but before the nineteenth century they occurred more often.