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feat(audio): crossfade overlapping clips in one undoable edit (phase 98)

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Johannes Findeisen 2026-11-06 02:10:11 +01:00
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@ -2178,12 +2178,12 @@ Implemented: transport Tap uses a bounded C99 four-interval estimator, 20–300
Apply matching linear boundary fades to two partially overlapping audio clips on one track, preserving source files and opposite fades. Reject ambiguous layouts transactionally and provide one undo step.
### Tasks and acceptance criteria
- [ ] Implement the workflow with bounded validation, safe preparation and documented limits.
- [ ] Pass meaningful core and/or GUI checks, including error and undo behavior.
- [ ] Document results and commit this phase separately.
- [x] Implement the workflow with bounded validation, safe preparation and documented limits.
- [x] Pass meaningful core and/or GUI checks, including error and undo behavior.
- [x] Document results and commit this phase separately.
### Implementation status
Planned.
Implemented: allocation-free C99 validation applies paired linear overlap fades atomically, retaining opposite fades, media, gains and positions. Ambiguous layouts reject. Exact overlapping-wave render and invalid-selection preservation checks passed, as did GUI two-clip crossfade/undo and warning-enabled builds.
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