tests

Improve stub in av.audio #1121

Job	Run time
py-3.8 lib-6.1 windows-latest	3m 25s
py-3.8 lib-6.1 ubuntu-latest	5m 16s
package-source	30s
py-3.8 lib-6.0 windows-latest	3m 13s
package-wheel (macos-latest, arm64)	15m 30s
py-3.8 lib-5.1 windows-latest	3m 48s
package-wheel (macos-latest, x86_64)	31m 0s
py-3.8 lib-5.0 windows-latest	3m 33s
style	18s
py-3.8 lib-6.0 ubuntu-latest	4m 6s
package-wheel (ubuntu-latest, aarch64)	3h 29m 13s
package-wheel (ubuntu-latest, i686)	22m 34s
package-wheel (ubuntu-latest, x86_64)	21m 24s
py-3.8 lib-5.1 ubuntu-latest	4m 41s
py-3.8 lib-5.0 ubuntu-latest	5m 47s
package-wheel (windows-latest, AMD64)	16m 3s
py-pypy3.9 lib-6.1 ubuntu-latest	5m 42s
py-3.8 lib-6.1 macos-latest	9m 41s
publish	39s
	6h 6m 23s

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