Reducing Echo from Recordings

I recently dialoged about Noisegate.ny plug-in which I was directed to get here https://itstillworks.com/12579485/how-to-remove-an-echo-in-audacity.
However, when I tried it I could not detect much, if any, improvement.
The recordings I have are videos where the person speaking was in an ambient space or wearing a mic but the recording was taken from room sounds through speakers.
The only thing I found searching this forum said that there is nothing which one can do about such echoes. Is that true?
Thanks

The only thing I found searching this forum said that there is nothing which one can do about such echoes. Is that true?

It’s true you probably saw it here.

An echo is your own voice reflecting from a flat surface and arriving at the microphone late. If your room has multiple flat surfaces, you get many echoes. Since sounds bounce more than once, you get millions of echoes.

Removing an echo, in English, means you expect the software to remove your voice from itself.

So that’s the problem. There’s no hook to tell the software what’s an echo and what’s not.

Echoes are usually lower volume than the original voice, but you can’t use that because nobody can keep expression-free reading for any duration. The minute you start changing volume (like reading a story with expression), you’re dead.

That’s one reason the newsies still shove microphones under people’s noses to get good sound.

Nobody would do that if there was any other way.

Koz

OK, your answer is clear.
Thanks…

There are DeReverb plugins, e.g. …
https://soundcloud.com/acondigital/sets/deverberate-2-demo-files
IMO not very good, & expensive.