SPRING 1SPRING 2SPRING 3CLICKINPUTREVERB TANKOUTPUTRECOVERY AMPDRYWETOUTLEVEL RECORDER0 dB−20−40−601234 sDECAY
The click: a twist that spreads into ripples, long waves firstTransducers: one coil, a magnet bead per spring; input left, pickup rightChart: one click's whole tail at real speedA reverb adds a wash of fading reflections after a sound. In this tank a click bounces along three springs; low frequencies travel faster, so each return arrives as a rising chirp, the twang. Watch is 50 times slower; Listen plays at real speed.The lesson in the lab: Reverb through the eras, five machines, one from each era.

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