n58-participant DSP check
true-peak fs/4 phase pi/4 A=0.5
sample-peak dBFS -9.0309
analytic TP dBTP -6.0206
delta 3.0103
linear 4x upsample peak still -9.0309 (misses inter-sample)
numpy 2026-09-06T14:23:13.409832+00:00