The flash was instant-on with a 0.32 s exponential tail, and a held
sustain kept re-feeding it — wires stayed lit for the whole note. The
requested feel is a shock: light hits the frets, they jolt, it's over.
The flash is now a one-shot pulse triggered on the input's rising edge:
a near-instant crack up (RISE 25 ms), a fast fall (FALL 160 ms) shaped
(1-u)^2 so it drops hard then eases out, with a 26 Hz flicker biting
into the fall (the electric shudder — the crack itself stays clean),
then hard zero. A held 'active' verdict keeps the input high
continuously, which by construction triggers nothing new: one strike
per hit, and the wires go dark while the note rings on. A re-strike
after the provider goes silent re-triggers cleanly.
Seeking backward or a long stall clears all pulse state, and a pulse
whose strike time lands ahead of the playhead after a seek is
discarded. The outer-pair bracket rule is unchanged — it now selects
across pulses instead of decay tails.
Knobs: FRET_WIRE_HIT_RISE / _FALL / _FLICKER_HZ / _FLICKER_DEPTH
(replacing FRET_WIRE_HIT_DECAY).
Signed-off-by: topkoa <topkoa@gmail.com>
e05d90e949