[obsidian] vault backup: 2025-07-01 16:37:01[
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		@@ -18,3 +18,5 @@ date: 2025-07-01 16:24
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(2025年に切れる予定)
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[US7667131B2 - Player technique control system for a stringed instrument and method of playing the instrument         - Google Patents](https://patents.google.com/patent/US7667131B2/)
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シャント抵抗で読み取ってるかと思いきや時間重畳なのかな
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