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Posts: 1

Bad Audio - External mic / battery bacpac, external battery / WiFi

Hi, I'm experiencing a "helicopter" like noise when recording with an external mic using WiFi. 

 

I'm also using a battery bacpac to plug an external battery pack into.

 

Any ideas/solutions for this issue?  I need to be able to record 4-6 hours continuously and have a microphone. The rig sits on a table so it doesn't have to be mobile.