qmk_firmware/Demos/Device/ClassDriver/AudioOutput/asf.xml

<asf xmlversion="1.0">
	<project caption="Audio Output Device Demo (Class Driver APIs)" id="lufa.demos.device.class.audio_output.example.avr8">
		<require idref="lufa.demos.device.class.audio_output"/>
		<require idref="lufa.boards.dummy.avr8"/>
		<generator value="as5_8"/>

		<device-support value="at90usb1287"/>
		<config name="lufa.drivers.board.name" value="none"/>

		<build type="define" name="F_CPU" value="16000000UL"/>
		<build type="define" name="F_USB" value="16000000UL"/>
	</project>

	<module type="application" id="lufa.demos.device.class.audio_output" caption="Audio Output Device Demo (Class Driver APIs)">
		<info type="description" value="summary">
		Audio 1.0 Output device demo, implementing a basic USB speaker.
		</info>

 		<info type="gui-flag" value="move-to-root"/>

		<info type="keyword" value="Technology">
			<keyword value="Class Driver APIs"/>
			<keyword value="USB Device"/>
			<keyword value="Audio Class"/>
		</info>

		<device-support-alias value="lufa_avr8"/>
		<device-support-alias value="lufa_xmega"/>
		<device-support-alias value="lufa_uc3"/>

		<build type="distribute" subtype="user-file" value="AudioOutput.txt"/>

		<build type="c-source" value="AudioOutput.c"/>
		<build type="c-source" value="Descriptors.c"/>
		<build type="header-file" value="AudioOutput.h"/>
		<build type="header-file" value="Descriptors.h"/>

		<build type="module-config" subtype="path" value="Config"/>
		<build type="module-config" subtype="required-header-file" value="AppConfig.h"/>
		<build type="header-file" value="Config/AppConfig.h"/>
		<build type="header-file" value="Config/LUFAConfig.h"/>

		<require idref="lufa.common"/>
		<require idref="lufa.platform"/>
		<require idref="lufa.drivers.usb"/>
		<require idref="lufa.drivers.board"/>
		<require idref="lufa.drivers.board.leds"/>
	</module>
</asf>