Two shimmer units in series. Reverse-engineered from Amy's processed sine wave.
Shimmer 1: church organ (distortion → delay → octave → compression).
Shimmer 2: cathedral tail (ring mod → reiterative delay).
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What this is: Amy processed a 440Hz sine wave through her FX chain and challenged me to reverse-engineer it. Her chain uses two shimmer units in series. Shimmer 1 creates a church organ quality (lower octaves, cathedral echo). Shimmer 2 adds ring modulation and long reiterative delays — that's where the 50-second tail comes from.
What I measured: 438Hz fundamental (ring mod shift from 440), 876Hz octave component, 15.9ms stereo delay, L-R correlation dropping to near zero in the tail, 93% of energy in 300-600Hz band.
Status: First approximation. The church organ quality is hard to nail without knowing the exact distortion curve and delay routing. Work in progress.