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BPM is now 25..280

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minjaesong
2026-05-08 20:40:25 +09:00
parent ed3bbb6ffe
commit 8e6f597e9b
9 changed files with 31 additions and 31 deletions
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10
xm2taud.py
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@@ -598,8 +598,8 @@ def encode_effect_xm(cmd: int, arg: int, ch: int = 0, row: int = 0,
return (TOP_NONE, 0, None, None)
if arg < 0x20:
return (TOP_A, (arg & 0xFF) << 8, None, None)
# Tempo: Taud T uses bias of -24 in stored form; mirror it2taud:
return (TOP_T, ((arg - 0x18) & 0xFF) << 8, None, None)
# Tempo: Taud T uses bias of -25 in stored form; mirror it2taud:
return (TOP_T, ((arg - 0x19) & 0xFF) << 8, None, None)
if cmd == 0x10:
# Set global volume 0..64 → Taud V (×4 to fit 0..255).
@@ -1249,7 +1249,7 @@ def assemble_taud(h: XMHeader, patterns: list, instruments: list) -> bytes:
# XM envelope frames advance once per row tick. Tick rate is derived
# from BPM the same way ProTracker derives it: ticks_per_sec = BPM × 2/5
# (matches MilkyTracker's tick clock and it2taud's ticks_per_sec).
tempo_for_envs = max(24, min(280, h.default_bpm if h.default_bpm > 0 else 125))
tempo_for_envs = max(25, min(280, h.default_bpm if h.default_bpm > 0 else 125))
ticks_per_sec = max(1.0, tempo_for_envs * 2.0 / 5.0)
# ── Build XM-instrument → list of Taud slot proxies ─────────────────────
@@ -1302,8 +1302,8 @@ def assemble_taud(h: XMHeader, patterns: list, instruments: list) -> bytes:
# ── Tempo / speed ───────────────────────────────────────────────────────
speed = h.default_speed if h.default_speed > 0 else 6
tempo = h.default_bpm if h.default_bpm > 0 else 125
tempo = max(24, min(280, tempo))
bpm_stored = (tempo - 24) & 0xFF
tempo = max(25, min(280, tempo))
bpm_stored = (tempo - 25) & 0xFF
vprint(f" initial speed={speed}, tempo={tempo} BPM")
# ── Channels / cue list ─────────────────────────────────────────────────