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A comment on Show HN: A saxophone with keyboard keys, in Rust. Parent comment

Re:Show HN: A saxophone with keyboard keys, in Rust by polishdude20 on Sunday November 20, 2022 @02:07PM (#33684086)
Yeah and is the pressure sensor closed so you're actually not blowing but just increasing and decreasing pressure?
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Re:Show HN: A saxophone with keyboard keys, in Rust by jcard0na on Sunday November 20, 2022 @03:40PM (#33685024)
No, not really. There is sensing tube (which terminates on the sensor) and a venting tube (which lets the air flow through). This is the same technique used in other similar commercial instruments. You can see both tubes in the assembly instructions: https://github.com/jcard0na/haxo-hw/blob/main/docs/assembly....
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Re:Show HN: A saxophone with keyboard keys, in Rust by polishdude20 on Monday November 21, 2022 @11:52PM (#33702082)
Ahh that makes sense! So is this actually sensing a lower pressure than ambient? Since moving air results in lower pressure?
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