Help/Advice on Aggregate Devices

I've been recording a podcast for a few weeks on my old Windows laptop using one microphone shared between all four of us participating, not ideal as you can imagine.
I am now a MacBook owner after many years of ******* and so decided to try and use an Aggregate Device to record from multiple mics but I am having a problem with a buzzing noise from one of the inputs.
The mics I am using are a Microsoft LifeChat headset and a Logitech USB Microphone. When used individually both work fine and give no problems. Once combined as an aggregate device the Logitech is fine but the LifeChat mic has a constant high-pitched buzzing/ringing on the track. I've tried messing with sample rates, re-sample etc but can not seem to eliminate this.
Am I wasting my time here and better just looking at picking up a cheap pre-amp?

OK, what I hoped would work does not
But one thing that could simplify bringing your copies from the flash cards into the structure and naming they should be to be recognized by your current catalog:
If you imported them into a temporary catalog, using the same naming and destination folder logic as when you originally imported them, this would bring the files into (or close to) the correct folder structure. Then in the main catalog, they could be reconnected easier if necessary at all. If you did have some kind of a date-based folder structure and did not do too much manual renaming, this should work quite well.
Beat

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