1209/2028 ZeyBack R2RDAC

VID	0x1209
PID	0x2028
Owner	Zeyback
License	GPL-3.0-or-later
Site	https://github.com/ERDALECE/ZeyBack
Source	https://github.com/ERDALECE/ZeyBack

USB Audio Class 2.0 interface (STM32H743 + FPGA) for a discrete R-2R DAC platform. Native DSD experiments in progress.