05-17-2021, 07:30 PM
(04-03-2021, 03:08 PM)Blooze Wrote: I tried the official pi power supply on just the pi/dac. About the same amount of noise as coming from the 30V supply thru the linear and buck. Definitely a power supply issue. I really want to stay with one power supply to keep it simple. I already am using most the outlets on two battery backups at work.
I only hear it when the player is stopped or paused. Not during a song or between songs. That’s why I wondered if there’s some code to mute the DAC when it’s not playing.
I did the HAT with TAS5713 for RPI Zero W. It works really well for about 1 year already with no noise. It's 24/7 on. I never switch it off. Just usually press STOP and when I need it - PLAY , that's it. But there's only speakers output.
What I can say about Your problem, I think it is I2S line. It should be traced really well outside of power line and as short as possible.
You may check it here http://www.rmicro.ru/en/blog/start
