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This is a usb audio interface made with cheap stm32f401rbt6 chip.It’s easy to buy in china(compare to atmel or ti or nxp).

1,async clock with external clocks input to stm32f4 series i2s_ckin pin, cpld device not required anymore.(see the schemaitcs for more infomation).

2,support 24bit 44.1/48/88.2/96k audio streaming formats.

3,working with “xmos stereo driver”,windows build-in driver,linux build-in driver.

please note Any Commercial Use Prohibited!! i share it only for your DIY.

all codes online view:

GitHub – rushxrushx/stm32f4_usbaudio: 使用Stm32F401实现的异步声卡(推荐！) async usb audio using STM32F401(active!)

have fun!

refrence schematics:

tested hardware with 1794 dac:

Attached Images

	F4WITH1794.JPG (232.8 KB)
	SCH.jpg (334.2 KB)