Assertion: bagpipe's drone | /r/HasAspect | one or two bead holes
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: As well as a tuning slide for precise adjustment of tuning, each drone will usually possess one or two 'bead holes' allowing its pitch to be raised by a tone or two, therefore allowing the piper to play in different musical keys, but still generally using the tonic, dominant and octave tonic combination of drone harmony.