Music for setting up speakers

@fiesta75-          
                     "...but he's accurate for initial setup."
         
    I've always done the same (whether in my own home, or a customer's) far as initial setup, but: there's no way Pink Noise and a mic can predict the reproduction of an accurate sound stage and image placement*, which is about what the OP seemed interested.

     Even if using the FFT and reverberation time measurements (time gating) as do some of the latest room correction programs and analyzers.

    *ONLY one's ears can detect that and there are way too many variables.  
             https://blogs.keysight.com/blogs/tech/rfmw.entry.html/2020/12/16/spectrum_analysisba-ObEM.html

 https://www.minidsp.com/applications/acoustic-measurements/loudspeaker-measurements

       Sorry OP, but facts are facts and when someone takes them to task...

" *ONLY one’s ears can detect that and there are way too many variables. "
you dont understand my posts. i dont necessarly disagree with you,

"there’s no way Pink Noise and a mic can predict the reproduction of an accurate sound stage and image placement*"
accurate soundstage and image placement is directly related to early reflections. Almost unvariably, everyone that treat his early reflections will mention how the soundstage open up.

when you treat those early reflections, moving the speaker 10 cm this way or 10cm will not shift the image like a untreated space do.

therefore, the premise that using music to find the best speaker position for soundstage and pin point imaging is flawed. Treating the early reflection is the solution. if you cant treat your space, sure using music to try to find the best speaker position works great. I used to do this myself, until I treated my space