Crackling audio when recording speakerphone

[mykleech]

I'm starting a podcast that involves a lot of over-the-phone interviews. I've been using a Blue Nessie USB microphone to record both my voice and my iPhone 6s speakerphone simultaneously. The problem is, whenever I start a call, the microphone records a steady, quiet crackling sound. When I hang up, the crackling stops. Does anyone have any idea what might be causing this or how I can make it go away? Thanks a trillion.

 

[tjwilliams25]

What device are you using to record the audio? Is it a Mac?

 

[mykleech]

It's an HP G72 Notebook PC.

 

[tjwilliams25]

Okay. I'm not sure what could be causing the interference, but I was thinking a workaround could be to use Handoff with a Mac and use that as the speakerphone.