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I am very new to audio and need some guidance. I inherited a setup where there is a mic and speakers in a meeting hall, and the audio output from that system feeds into a bridging input transformer.

I need that transformer to send a signal to the microphone input of a MacBook Air so I can use the sound to broadcast a Zoom meeting.

I have three questions:

  1. How can I connect the output leads of that transformer to the 3.5mm TRRS input of the MacBook? I have an adapter like this so far.
  2. Does that transformer just do some kind of impedance matching, or does it actually change the sound somehow?
  3. Is there some kind of device I can get that will equalize/balance the audio input so that if the speaker makes hard consonant sounds they don't make the sound level spike and get distorted?

Thanks in advance for your help!

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