I'm trying to get my Pi (Model 3) set up with external audio. I bought the following:
- https://www.amazon.com/gp/product/B01MY ... UTF8&psc=1
- https://www.amazon.com/gp/product/B01CH ... UTF8&psc=1
With this arrangement, there is an audible hum whenever power is applied. I believe this is related to the power and probably something related to grounding based on my reading. However, I'm finding lots of competing information about what I can do to clean up this sound. Can anyone offer specific suggestions to remove the hum?