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resolving envelope ambiguity

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minjaesong
2026-05-06 17:10:13 +09:00
parent 0124b062d0
commit e64e335db3
7 changed files with 119 additions and 49 deletions
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7
s3m2taud.py
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@@ -499,8 +499,11 @@ def build_sample_inst_bin(instruments: list) -> tuple:
# Volume envelope first point is full-scale; per-sample level is carried
# by IGV (byte 171) so the envelope contributes a unit multiplier.
env_vol = 63
# Vol LOOP word: only b=1 (use envelope) — no actual loop / sustain.
vol_env_loop = 0x0020
# Vol LOOP word: P=1 (envelope present) | b=1 (use envelope) — no actual
# loop / sustain. P added 2026-05-06 alongside the pan/pf gate spec
# change (terranmon.txt byte 16/18/20 bit 5); informational for vol but
# set for consistency. Pan/PF stay zero so the engine sees P=0 there.
vol_env_loop = 0x2020
base = taud_idx * INST_STRIDE
struct.pack_into('<I', inst_bin, base + 0, ptr) # u32 sample pointer