I used to use a snowball mic but now find a lapel mic much better and they are cheap to buy. The echo is probably because of the room. If you try recording in different rooms, especially carpeted, it might solve the problem. Correcting issues with software is better avoided in my experience. I recorded tests in every room in my house. You might be surprised at the difference. I spent a year scientifically testing visual and audio to get the best results. Now I am recording my course it's working out pretty well.
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