c989add4cd
Add sound pitch correction functionality, so that retimed sound strips can preserve their original pitch. This has been implemented as a GSoC 2025 project. Actual pitch correction is done with Rubberband library, which has been already included into Blender 5.0 library builds; and then most of the other code has been in Audaspace, which was already updated within Blender tree earlier. So this PR just flips on Rubberband build option, and adds the checkbox to VSE sound strips for pitch correction (on by default for newly created sound strips). Pitch correction works with both simple whole-strip retiming, as well as more complex retiming setups where different parts of the strip use different speeds. Co-authored-by: Aras Pranckevicius <aras@nesnausk.org> Pull Request: https://projects.blender.org/blender/blender/pulls/143347
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