Bistoury is out.
This one started as a ChucK script I kept reaching for during sound design sessions — drop a file, get the cuts, move on. At some point I figured if I was using it this much, maybe others would too.
It finds where sounds actually begin — not where they get loud, but the true foot of the attack. Backtracks before the transient so your cuts land clean. Works on drums, yes, but also pads, bowed strings, anything with an onset buried under a slow build.

wandersound.ca/bistoury