Ask your LOR regarding A Capella music.
I agree with PBA, that it’s motzi laaz to say it has “real music” unless you know for sure that it is.
Perhaps as a way to be dan liKaf Zechus, it should be understood that music can be dramatically changed from initial recording to output. If you compare older concerts to the studio recordings of the same song, you can hear a remarkable difference between them, and that’s with instruments.
So just because it sounds “music-like” does not mean that they cheated and used real instruments. Given the above, I would think it’s certainly computer manipulation.