Does anyone know how to remove sound effects of all kinds using Audacity? I'm working on an extension of the soundtrack to Portrait of Ruin, and I'm stuck on track 2-10 ("Silent Prison"). I'm trying to splice the beginning to the end part so it'll loop twice, but the former has this annoying piano sound ("plink") embedded into it, and it keeps messing up the loop whenever I try to replace the final part. Can anyone offer any advice? If I can't use Audacity to do this, what other programs could I try? Thanks in advance.

There's no definitive way to remove sound effects.

People only get lucky depending on the mastering of the movie.

Sometimes the there will be no bleeding sfx or dialogue in the surrounding channels.
The center channel houses most of the dialogue and sfx, but it's no guarantee.

It's a gambit.

Mute the center channel and listen to the rest.
See what you can get.

If there's echo, it's there to stay.

There's some software from Sony that can help reduce those sounds, but you honestly won't get anything different.
You'll still have traces and it will be noticeable.

It will be like a hiccup you can't get rid of.

There really aren't any options, I'm afraid.
Not even the MAC-exclusive programs, which do mostly the same things as Windows programs.

If anything, you'll only destroy more audio since a lot of it can share the same frequency ranges.
They share the same domain.

You would need to pay thousands to a profressional studio to the best they can.
And present yourself as a legitimate business (and not for piracy).
Even then, there's so definite guarantee.
Most of the profressional/studio hack jobs largely depend on the destroyed music being used in other music so the layers of other music will mask the broken isolated music.

What you're asking for is a sci-fi miracle that happens in movies and tv shows that just doesn't exist in real life.