Hello
I am eying this R2-r dac board.
They’re called
“XY-R2R-XLR-V2 Network Decoder Board DAC Board 24Bit 384Khz PCM NOS R2R High-Precision Resistance”
You can find this board on all the usual Chinese sites.
Link to the board on Aliexpress
I find this board on the paper really tempting...