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fix: E6x skipped on xm2taud.py

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minjaesong
2026-05-07 00:59:05 +09:00
parent ec0f41b574
commit cc492c4ead
3 changed files with 9 additions and 8 deletions
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4
TAUD_NOTE_EFFECTS.md
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@@ -1014,8 +1014,8 @@ There is no separate "use fadeout" flag — both extremes share the same field,
- L_gain = if (pan < 0x80) 1.0 else 1.0 - (pan - 128.0) / 128.0 - L_gain = if (pan < 0x80) 1.0 else 1.0 - (pan - 128.0) / 128.0
- R_gain = if (pan < 0x80) pan / 128.0 else 1.0 - R_gain = if (pan < 0x80) pan / 128.0 else 1.0
- Panning-equal-power: - Panning-equal-power:
- L_gain = cos(pi*x / 512.0) - L_gain = cos(πx / 512.0)
- R_gain = sin(pi*x / 512.0) - R_gain = sin(πx / 512.0)
- Amiga tone (both coarse and fine E/F pitch slides). The `slideArg` is a **raw tracker period-unit count** (no scaling), with sign matching linear mode (negative for E, positive for F). Coarse slides apply on every non-first tick; fine slides apply once on tick 0 — the per-step arithmetic is identical: - Amiga tone (both coarse and fine E/F pitch slides). The `slideArg` is a **raw tracker period-unit count** (no scaling), with sign matching linear mode (negative for E, positive for F). Coarse slides apply on every non-first tick; fine slides apply once on tick 0 — the per-step arithmetic is identical:
- AMIGA_BASE_PERIOD = 428.0 (period at the Taud reference pitch C4 for a standard 8363 Hz instrument, NTSC clock — identical to PT "C-2" period 428) - AMIGA_BASE_PERIOD = 428.0 (period at the Taud reference pitch C4 for a standard 8363 Hz instrument, NTSC clock — identical to PT "C-2" period 428)
- period = AMIGA_BASE_PERIOD × 2^(−(noteVal − C4) / 4096) - period = AMIGA_BASE_PERIOD × 2^(−(noteVal − C4) / 4096)

4
terranmon.txt
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@@ -2327,8 +2327,8 @@ TODO:
2026-05-06 .taud files predate the P bit and need re-conversion 2026-05-06 .taud files predate the P bit and need re-conversion
for pan/pf envelopes to play. See byte 15/17/19 spec for the LOOP for pan/pf envelopes to play. See byte 15/17/19 spec for the LOOP
word bit layout. word bit layout.
[ ] implement extended tone mode (MONOTONE compat) [x] slumberjack.xm: E6x commands are not processed
[ ] pattern loops stops working after processed once (test with slumberjack.xm) [ ] implement linear-freq tone mode (MONOTONE compat)
[ ] milkytracker-style volume ramping (on sample-end only) [ ] milkytracker-style volume ramping (on sample-end only)

9
xm2taud.py
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@@ -611,10 +611,11 @@ def encode_effect_xm(cmd: int, arg: int, ch: int = 0, row: int = 0,
# Set finetune — convert to S5x sub-effect (4-bit signed nibble). # Set finetune — convert to S5x sub-effect (4-bit signed nibble).
return (TOP_S, 0x5000 | (val << 8), None, None) return (TOP_S, 0x5000 | (val << 8), None, None)
if sub == 0x6: if sub == 0x6:
# Set loop point / loop. Taud S6x = fine pattern delay; the # XM E6x = pattern loop (E60 sets loop start, E6x with x>0 loops
# closest analogue here is dropping with a warn if val>0. # x times). Maps directly onto Taud SBx, which has identical
vprint(f" dropped E6{val:X} (set loop) at ch{ch} row{row}") # semantics — the engine handles per-voice loopStartRow /
return (TOP_NONE, 0, None, None) # loopCount in applySEffect (sub 0xB).
return (TOP_S, 0xB000 | (val << 8), None, None)
if sub == 0x8: if sub == 0x8:
# Pan position 0..15 → set pan column (XM nybble × 17 → 8-bit). # Pan position 0..15 → set pan column (XM nybble × 17 → 8-bit).
pan8 = (val << 4) | val pan8 = (val << 4) | val