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2taud update

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minjaesong
2026-04-29 11:27:29 +09:00
parent 2282e0c10b
commit 27e4bc1ae5
3 changed files with 5 additions and 5 deletions
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2
it2taud.py
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@@ -531,7 +531,7 @@ def parse_instruments(data: bytes, h: ITHeader) -> list:
# Parse IT envelopes (new-format only, ≥cmwt 0x200) # Parse IT envelopes (new-format only, ≥cmwt 0x200)
# Vol envelope at ptr+0x130; pan envelope at ptr+0x182 # Vol envelope at ptr+0x130; pan envelope at ptr+0x182
ticks_per_sec = max(h.initial_tempo / 60.0 * h.initial_speed, 1.0) ticks_per_sec = max(h.initial_tempo * 2.0 / 5.0, 1.0) # tick rate = bpm×2/5 (50 Hz at 125 BPM); speed is ticks-per-row, irrelevant here
inst.vol_envelope, inst.vol_env_sustain = _parse_it_envelope( inst.vol_envelope, inst.vol_env_sustain = _parse_it_envelope(
data, ptr + 0x130, False, ticks_per_sec) data, ptr + 0x130, False, ticks_per_sec)
inst.pan_envelope, inst.pan_env_sustain = _parse_it_envelope( inst.pan_envelope, inst.pan_env_sustain = _parse_it_envelope(

4
s3m2taud.py
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@@ -624,8 +624,8 @@ def build_sample_inst_bin(instruments: list) -> tuple:
struct.pack_into('<H', inst_bin, base + 8, ls) struct.pack_into('<H', inst_bin, base + 8, ls)
struct.pack_into('<H', inst_bin, base + 10, le) struct.pack_into('<H', inst_bin, base + 10, le)
inst_bin[base + 12] = flags_byte inst_bin[base + 12] = flags_byte
# Volume envelope: hold at instrument volume (vol*4 clamped to 255) # Volume envelope: hold at instrument volume (clamped to 0x3F)
env_vol = min(inst.volume * 4, 255) env_vol = min(inst.volume, 63)
inst_bin[base + 16] = env_vol # volume inst_bin[base + 16] = env_vol # volume
inst_bin[base + 17] = 0 # offset minifloat = 0 → hold inst_bin[base + 17] = 0 # offset minifloat = 0 → hold

4
terranmon.txt
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@@ -2018,10 +2018,10 @@ Instrument bin: Registry for 256 instruments, formatted as:
Bit8 Reserved Bit8 Reserved
Bit16x8 Volume envelopes Bit16x8 Volume envelopes
Byte 1: Volume (00..3F) Byte 1: Volume (00..3F)
Byte 2: Second offset from the prev point, in 3.5 Unsigned Minifloat Byte 2: Time until the next point, in seconds (3.5 Unsigned Minifloat). 0 = hold at this point indefinitely.
Bit16x8 Panning envelopes Bit16x8 Panning envelopes
Byte 1: Pan (00..FF) Byte 1: Pan (00..FF)
Byte 2: Second offset from the prev point, in 3.5 Unsigned Minifloat Byte 2: Time until the next point, in seconds (3.5 Unsigned Minifloat). 0 = hold at this point indefinitely.
Bit16x8 Reserved Bit16x8 Reserved
Play Data: play data are series of tracker-like instructions, visualised as: Play Data: play data are series of tracker-like instructions, visualised as: