How do you make a music track sound better that had to use a microphone to record from the speakers?

I am using Audacity version 2.0.6 on a Windows 7 computer and a Windows 10 computer.
How do you make an indirect recording music track sound like a direct recording that had to use a microphone to record from the speakers? I want the recording to sound like it did not have to use a microphone to record from the speakers. Any effects or techniques that can do this?
Here’s an indirect recording example: (Using a microphone to record off the speakers)
https://www.youtube.com/watch?v=KB4uwITfl6w

Here’s a direct recording example: (Using RCA cables)
https://www.youtube.com/watch?v=sEU87jZBm3c

I want the indirect recording to sound like the direct recording. Making a microphone recording sound like it used RCA cable jacks. Any ideas? Cuase, I don’t own this Casio SK-5 keyboard. I wish I did have this Casio SK-5 keyboard.

It’s possible to make a normal recording sound like it was in a bathroom …

barthroom preset in Audacity's native reverb effect.png416×639 14.2 KB

But not the other way around.

Thanks. I’ll give it a try.

The Audacity’s reverb-effect does not remove bathroom reverb, it simulates it.

Removing reverberation is impossible.