I've seen several posts that mention audio static, but haven't seen any linking the static to the CPU function. This is definitely what is going on with my Pi3. If I watch the System Monitor, anytime I hear the static, then one of the CPUs is going over 50%. I don't know what causes this, but I'd love to have it explained. I thought it might be a grounding issue, but it doesn't seem to matter whether I use speakers or headphones. I tried a few of each, and if it was a grounding issue things should have changed a little between each of the output devices, but it doesn't seem to. I don't use HDMI audio, so I can't say if it does the same thing.
Even if no one has a solution for this, I'd still like to understand what is happening.
Any reply welcome. Thanks for taking the time to read this.