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Taud: equal-energy panning only

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minjaesong
2026-05-08 20:23:46 +09:00
parent 27b0f2e63f
commit ed3bbb6ffe
10 changed files with 63 additions and 103 deletions
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12
s3m2taud.py
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@@ -812,11 +812,13 @@ def assemble_taud(h: S3MHeader, instruments: list, patterns: list) -> bytes:
cue_comp = compress_blob(bytes(cue_sheet), "cue sheet")
# Song table row (32 bytes; see encode_song_entry).
# flags byte: bit 1 (f) = Amiga pitch-slide mode (mirrors the S3M linear_slides flag inverted).
# bit 2 reserved (was 'm' fadeout-zero policy; removed). S3M has no instrument-level
# fadeout, so every Taud instrument carries fadeout=0 ("no fade") — notes retire on
# sample-end or pattern note-cut effects (SCx) instead, which matches ST3 semantics.
flags_byte = (0x00 if h.linear_slides else 0x02)
# flags byte: bits 0-1 (ff) = tone mode. ff=1 (Amiga period slides) when S3M's
# linear_slides flag is clear; ff=0 otherwise. Pan law is fixed engine-wide to
# the equal-energy — no `p` bit any more. Bit 2 reserved (was 'm' fadeout-zero
# policy; removed). S3M has no instrument-level fadeout, so every Taud instrument
# carries fadeout=0 ("no fade") — notes retire on sample-end or pattern note-cut
# effects (SCx) instead, which matches ST3 semantics.
flags_byte = (0x00 if h.linear_slides else 0x01)
song_table = encode_song_entry(
song_offset=song_offset,
num_voices=C,