Should I build a ProtoDAC?

[Guido57]

FWIW I completed my regulated linear power supply project to power my Pi/ProtoDAC combination.  Subjectively, with this PS the ProtoDAC is in the same league as the Modius.  I would be surprised if this wouldn't help other I2S DACs on the Pi.  Cost for PS board was about $20, add five more for cables and jacks.

That's good to hear. Which PS board are you using, if you don't mind me asking?

https://www.ebay.com/itm/186679360015

I'm sure one could build an equivalent board, probably for less but I did not price out the components. I was also curious about boards available on Ebay and decided to take the chance. Seems to hold a solid 5V when adjusted.