Webinar Audio Optimization

I'm seeking an audio specialist to resolve echo voice audio issues during my recorded webinar. The problem occured throughout the entire session, sounding OK during with the earbuds connected to the ATEM Mini yet final product combines two audio sources making the voices sound echoey. This project was using an ATEM Mini (classic model) for audio input.

Key Requirements:
- Diagnose and fix echo/feedback issues
- Ensure video is clear, professional sound quality
- Experience with ATEM Mini and similar audio setups

Ideal Skills and Experience:
- Background in audio engineering or sound design
- Familiarity with webinar audio setups
- Problem-solving skills for real-time audio issues

Please provide a brief overview of your approach and relevant experience.