I stumbled upon a new resource for separating vocals from music: https://makenweb.com/SpleeterGUI

You can find the source files on GitHub, but the GUI is drag-and-drop easy. Unfortunately, that means that it doesn’t have much in the way of adjustable variables.

Just for fun, I ran the Leia Hologram audio through it to see what would happen, you can download the result here:
https://mega.nz/folder/yR0SERTA#o6bkOu2Rm4nGOJO-b39A0g

In this example, the Knockout program does a slightly better job at removing traces of the music at the cost of the vocals, while Spleeter retains more vocal clarity at the cost of some low-level music seeping through. While it wouldn’t be able to create a totally music-free scene, I’d bet this program would be able to facilitate a fairly convincing music replacement in many circumstances.