[ 3/04/2020 ] Labels: 3G9E.Resonance G
When the E(/F) pitch forced to shift slightly high or low, top-plate gives up the current wave cycle then creates a new one.
Cello: Cello-1 (8-year-old)
100 times slower, silent video
Reference post:
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--> 63.Wolf tone
--> 63. Memo for wolf tones