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impl S6x and Wxx cmd

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minjaesong
2026-05-02 14:15:34 +09:00
parent 5dc87a80be
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TAUD_NOTE_EFFECTS.md
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@@ -666,7 +666,17 @@ ProTracker `E5x` maps to Taud `S $2x00` with the same index meaning.
**Compatibility.** IT `S6x` maps directly.
**Implementation.** TODO
**Implementation.** Maintain a per-row accumulator `fine_delay_extra` on the tracker state, initialised to 0 at the start of every row parse (including pattern-delay repetitions caused by S $Ex). Each S $6x command encountered during the row scan adds `$x` to `fine_delay_extra`. The row then runs for `speed + fine_delay_extra` ticks instead of the usual `speed` ticks before advancing to the next row.
```
on row parse (S $6x):
fine_delay_extra += x # sum across all channels
row ends when:
tick_in_row >= ticks_per_row + fine_delay_extra
```
S $6x and S $Ex are orthogonal: when S $Ex is active the current row repeats `$x` additional times, and each repetition is itself extended by `fine_delay_extra` (re-accumulated from the same row's S $6x commands). There is no memory for S $6x; `$x == 0` is a no-op.
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