Assertion: harmonica's reed | /r/CapableOf | mount over a reedplate slot
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Source sentences:
text: both overblowing and bending on such an instrument: a free reed mounted over a reedplate slot will normally respond to air flows that pull it initially into the slot, i.e., as a closing reed, but, at only slightly higher air pressure from the opposite side, will also respond as an opening reed; the resulting pitch is generally just less than a semitone higher than the closing-reed pitch.