Mamboberry HD DAC+ v2 - constant noise

[TheOldPresbyope]

...but I get a constant loud noise (I had it too with Hifiberry)...


1. to your knowledge is there a Sabre chip DAC with Hardware volume controller ? I have a jitter and cracks with Hifiberry
2. I have a linear power supply, so I'll try another Pi

Hi,

I combined bits of two of your posts in the above quote.

Since you have this constant loud noise with either DAC you should be suspicious of *all* your external components. These include

• The downstream audio equipment. One possibility is it's being over-driven by the DAC output.
  
• The power supply. Just because you "have a linear power supply" doesn't mean it's good for this purpose. Try substituting a genuine RPi power supply just to be sure.
  
• The RPi. I have to say I'm dubious but swapping RPis is an easy test.
  
• Grounds (or earths in countries which speak the Queen's English  ). Improper grounding of various pieces of audio equipment can induce hum/noise. Granted this is not as common a problem as it used to be, but it still can happen.
  

Since you've already replaced the HiFiBerry DAC+ Pro this observation might be irrelevant but I've not experienced the issues you had with yours. Since Tim makes it so easy to configure, I've tried both software volume control and hardware volume control with this DAC and it works fine for me with either choice. (I don't believe hardware volume control is a magic elixir, by the way.)

Regards,
Kent