The choice of music will drastically impact the experience, which is your state of mind. SWIM would suggest no music, however the experience is entirely yours.

SWIM has used music for guided trips, and this one example of a soundscape that SWIM transcended with that which was extremely comforting and stimulating.

SWIM suggests something like this, or no music at all.

Go into nature if you can remove yourself from man made sounds.

Blessings <3