What the report's columns mean

  preset           bass    mid   treb  onset  count  drive   anim    rate  cover  level  rise  fall
  Shatter         0.099  0.064  0.013  0.106  0.077  0.103  0.092 0.0358+  0.580 0.0487   11+    4+
  Stipple         0.050  0.013  0.001  0.011  0.003  0.057  0.010 0.0132+  0.335 0.5804    7+   26+

column	question it answers
bass mid treb onset	how far the frame moves when that stimulus alone comes up, against silence — “does this preset respond to bass at all”
count	does the musical clock reach the picture — beat_index, bar_index, the beat and bar phases, and a beat- or bar-held binding, none of which move in any other column. It is the mean over a 48-frame sequence at silence with a beat every 5 frames (720 BPM, deliberately not a tempo), differenced frame by frame against 48 silent frames, so its magnitude is not comparable to the settled band cells beside it. A preset that reads no clock reads exactly 0.000, and one that reads only beat shows here as well as in onset, because the clock fires beat on every step of its counter. Like drive, read it against family neighbours, never as a threshold
drive	how far the frame moves under the combined stimulus — silence against everything up at once, same depth and same size (the two motion readings)
anim	how far the frame moves between two capture depths under silence — does it have a life of its own
rate	how far the frame moves frame to frame — the only column that walks consecutive frames, and the only one measured at 96x96 (the two motion readings)
cover	fraction of the frame that differs from the frame’s own ground — a low value is often correct
level	how much light the picture carries: mean linear light over the pixels cover counts as lit (what the level column measures)
rise fall	the transient probe (below) — frames to settle after a step up, and after the matching step down; a + suffix means the value is a lower bound, not a measurement (below); read them as evidence, not a verdict

In this section

• What the level column measures
• The frame-cost block
• The two motion readings
• The transient columns
• What the transient columns cannot see
• A low cover is not a defect
• The second reading: the same columns at realistic levels
• Reachability: gates the probe never drove both ways
• Saturation: a HARD gate on clamp occupancy