Odd Signal Observed

Hey guys.
This isnt really an issue. It’s more of a curiosity in my sound journey.
I was recording at my friends house is is both a programmer and electric guitar enthusiast.
In his recording in Pro 8 I observed an awesome sounding signal propogating at base level then 60 then 180 and I think 300 and so on. It seemed an odd spread to me and more indicative of radio? Any ideas?

I’ll probabaly cut it and use it for sound design.

60Hz hum (and its harmonics at 120, 180, etc) sounds like electromagnetic interference from the power grid, which is powered at 60Hz in the US: North American power transmission grid - Wikipedia

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It’s EMI, as Robin suggested…

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