add audio source to readme #1257

Job	Run time
build_debian_bullseye	3m 40s
build_android	12m 6s
build_debian_bookworm	4m 5s
build_debian_buster	3m 3s
build_debian_sid	4m 0s
build_macos_arm	2m 40s
build_macos_intel	5m 49s
build_raspios_bullseye_armhf	9m 8s
build_ubuntu_focal	3m 32s
build_ubuntu_jammy	3m 4s
build_ubuntu_mantic	3m 25s
check_formatting	11s
build_windows	15m 25s
check_spelling	13s
create_full_archive	9s
update_nightly_release	6s
	1h 10m 36s

Provide feedback