Add SDL audio device example #789

Job	Run time
mypy	28s
sdist	1m 4s
ruff	7s
tox (ubuntu-latest)	2m 24s
tox (windows-latest)	3m 12s
test-docs	2m 11s
linux-wheels (x86_64, cp38-manylinux*)	2m 49s
linux-wheels (x86_64, pp38-manylinux*)	3m 30s
build-macos (cp38-*_universal2)	4m 55s
build (ubuntu-latest, 3.8, x64)	3m 51s
linux-wheels (aarch64, cp38-manylinux*)	22m 27s
build-macos (cp38-*_x86_64)	3m 49s
parse_sdl (windows-latest, 2.0.14)	1m 16s
build (ubuntu-latest, 3.9, x64)	3m 41s
linux-wheels (aarch64, pp38-manylinux*)	14m 26s
build-macos (cp38-*_arm64)	3m 32s
parse_sdl (windows-latest, 2.0.16)	52s
build (ubuntu-latest, pypy-3.8, x64)	3m 49s
build (windows-latest, 3.8, x64)	4m 32s
build-macos (pp38-*)	3m 15s
parse_sdl (macos-latest, 2.0.14)	35s
build (windows-latest, 3.9, x64)	4m 59s
parse_sdl (macos-latest, 2.0.16)	2m 52s
build (windows-latest, pypy-3.8, x64)	6m 27s
build (windows-latest, 3.8, x86)	4m 24s
build (windows-latest, pypy-3.8, x86)	6m 55s
publish	0s
	1h 52m 22s

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