What:		/config/usb-gadget/gadget/functions/uac1.name
Date:		Sep 2014
KernelVersion:	3.18
Description:
		The attributes:

		audio_buf_size - audio buffer size
		fn_cap - capture pcm device file name
		fn_cntl - control device file name
		fn_play - playback pcm device file name
		req_buf_size - ISO OUT endpoint request buffer size
		req_count - ISO OUT endpoint request count