[bdbarnett]

Each effect now says, in one sentence, how hot its input can be while its defaults and patches stay off the rails. The knobs that clip by design are named in one line instead of being excused cell by cell.

Seventeen effects state an input level below full scale, from -3 dBFS (Bitcrusher, LowPass) down to -24 dBFS (CombFilter, where two resonant patches build a DC offset up to the rail). Each level was measured with the ceiling kit on the defaults and every patch, 48 kHz stereo, across all its materials, in 3 dB steps. Each effect gets a quick test (1 to 15 s) that holds both halves: clean at the stated level, and red one step up on the setting that rails first. The thirteen effects that are clean at full scale state nothing, because full scale is what the kit holds them to anyway.

CLIPS_AT_TOP names the macros whose top is meant to clip: an output Trim or Gain, a boost, Drive, Feedback, Attack. The ceiling kit skips the rail check where one of them sits at 127, and still judges wraps there. Ten effects declare it, each with a one-line note in its player text. test_kit plants cover both sides, and so does CLIPS_BY_DESIGN = True, a class-wide form that no effect uses yet.

CombFilter, LadderFilter, Reverb and TransientShaper also stated a plucked phrase's clean level, with tests that probed above the new stated level. Those sentences and tests are gone, so each effect states one level. The remaining older level notes (Reverb's noise and tone figures, ParametricEQ's headroom section, AnalogDelay's Mix ceiling) describe other things and stay.

Compressor, Overdrive, Exciter and Distortion follow separately.

Part of #147.