[Draft experiment] Encoded audio source #1093

Job	Run time
Build (x86_64-pc-windows-msvc)	6m 36s
Build (aarch64-pc-windows-msvc)	5m 59s
Build (x86_64-apple-darwin)	8m 29s
Build (aarch64-apple-darwin)	13m 52s
Build (aarch64-apple-ios)	9m 58s
Build (aarch64-apple-ios-sim)	11m 0s
Build (x86_64-unknown-linux-gnu)	3m 24s
Build (aarch64-unknown-linux-gnu)	5m 12s
Build (aarch64-linux-android)	3m 42s
Build (armv7-linux-androideabi)	3m 24s
Build (x86_64-linux-android)	3m 35s
	1h 15m 11s

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