Many old school call-center type headsets will output a nasty hum which is loud and terrible. And many podcast guests still use these types of headsets because they have them handy because they bought it like 15 years ago or something.
Use a de-hum processor to remove the hum or hums (yes, there may be several hums, not just one).
Many DAW’s have built in hum removal processors, and of course iZotope RX 8 has an excellent De-hum module.
What do you use to remove nasty hums?
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