Fixes mixdown prefs #727

Job	Run time
Build macOS (arm64)	43m 50s
Windows MSVC 2019 (x86)	27m 18s
Build macOS (x86_64)	42m 14s
Windows MSVC 2019 (x86_64)	26m 9s
Ubuntu 20.04 AppImage (x86_64)	29m 54s
Windows MSVC 2022 (x86)	27m 51s
Ubuntu 20.04 AppImage (x86_64, gcc 11)	28m 52s
Windows MSVC 2022 (x86_64)	26m 11s
Ubuntu 22.04 AppImage (x86_64)	27m 7s
Source Tarball	6m 17s
Package macOS (x86_64, arm64, universal)	7m 23s
	4h 53m 6s

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