Use only the reverb of a sound

[NoLie6]

Hi folks,

I want to use something special in a track, and I am not sure how to do it.

What I want is just to have the reverb of a played sound/note, not the sound/note itself. I think this is not possible with the amp envelope, cause it covers only the active sound/note time.
Up to now I think I would need post production of the created wav signal, where I cut or silence the period of the note.

Had someone else tried this?