Music for setting up speakers

I listened to some solo violin and cello, some folky vocals, some Led Zepp just because :0)

maybe music where instruments are easily located ect

I think you are on the right track listening to solo acoustic instruments. I would add some chamber music to your playlist, so you can get a good picture of how they are reproducing instruments in relation to each other, in an actual acoustic space.

When I am first setting up a system, I try to avoid recordings with a lot of studio production methods, since they tend to disguise how an instrument sounds playing without effects, in a real acoustic space. 

This will also get you a natural sounding soundstage and image, without studio panning, digital delays, phase changes, etc. 

I fear people missed that Yello and even XLO are a joke. Yello is mood music for unboxing. XLO is a great test CD. But really the music used is way down the list and hardly relevant. 

Speaker setup is first, put them where the tone, and bass response, are pleasant and smooth. It really does not matter what music is used, just so long as it has enough bass variety and enough vocals or instrumentals to be sure of getting a good midrange balance.  

Next step uses a tape measure, no music required. Adjust the speakers to be precisely equidistant and with symmetrical toe in. Finally, listen to lots of music and make very small adjustments to toe. More toe in, deeper image, more precise imaging. Less toe in, wider stage, less precise imaging. When done, double check with the tape measure to be sure they are still perfectly equidistant and symmetrical.

That is it. Done. No special music required at any step in the process. The music you play should be, as always, music you enjoy.

cant believe audiphile who spends thousands on their system, havent understood or been explained clearly that the way to setup a speaker in a room is with a mic and careful measuring.

Magenta haze > pink noise.

                       "Maybe music where instruments are easily located, etc."

      The OP is clearly interested in accurate sound staging and imaging, as (at least) one goal of their set-up (considered two, by some).

      While one can use test instruments, to measure and balance SPLs and correct frequency response aberrations; they can't replace the human ear, when it comes to ambience recovery and voice placement (whether instrument or vocal).   What, exactly, would you measure, pray tell?

       The scientifically designed tests and Chesky CD I mentioned, were created to allow one to use their ears and eliminate any variables, from their listening trials.