Hat DAC for PiZero-W

[Blooze]

It’s the buck converter or the switching power supply or a combo of both. I put in 30V for my amp and drop it to 27V through the linear reg. I added the buck converter to the 27V output and it cut the noise by half. I only hear noise when the player is stopped. I wonder if I could have the player mute when not playing? That would fix it well enough for me as I’m not looking for audiophile here, just decent sound.