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fixing the low volume issue, finally

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minjaesong
2026-05-09 01:57:40 +09:00
parent 6b02d73600
commit 935fbe04a6
8 changed files with 191 additions and 67 deletions
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15
xm2taud.py
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@@ -1013,8 +1013,9 @@ def build_sample_inst_bin_xm(proxies: list) -> tuple:
# Resolve envelope LOOP / SUSTAIN words from the proxy. When XM has no
# envelope, fall back to a single-point unit envelope (vol LOOP word
# b=1 plus P=1 for consistency) and rely on IGV for level. Pan stays
# zero so the engine sees P=0 there and skips envelope-driven pan.
# b=1 plus P=1 for consistency) and rely on DNV (byte 196) for the
# per-trigger initial level. Pan stays zero so the engine sees P=0
# there and skips envelope-driven pan.
if s.vol_env_pts is not None:
vol_env_loop = s.vol_env_loop_word
vol_env_sus = s.vol_env_sus_word
@@ -1063,8 +1064,14 @@ def build_sample_inst_bin_xm(proxies: list) -> tuple:
inst_bin[base + 121 + k * 2] = 0x80
inst_bin[base + 121 + k * 2 + 1] = 0x00
# IGV: XM volume 0..64 → 0..255
inst_bin[base + 171] = min(0xFF, round(s.volume * 255 / 64))
# XM has no continuous instrumentwise volume scaler — `s.volume` (0..64)
# is purely the per-trigger initial value (FT2 ft2_replayer.c handles
# this exactly the same as IT does with sample.vol). So byte 171 (IGV)
# stays at full unity and byte 196 (DNV) carries the per-instrument
# default. Pre-2026-05-09 layout folded s.volume into IGV — see
# terranmon §2350.
inst_bin[base + 171] = 0xFF # IGV: continuous unity
inst_bin[base + 196] = min(0xFF, round(s.volume * 255 / 64)) # DNV
# Fadeout: 12-bit. Low 8 bits at +172, high 4 bits at +173.
inst_bin[base + 172] = s.fadeout & 0xFF
inst_bin[base + 173] = (s.fadeout >> 8) & 0x0F