Hi Genius, go right ahead, be comfortable with the new track.
I have my favourites too and I also like to meditate without. I have the sound turned right down most of the time so the sounds covering the entrainment sounds are barely noticeable - the entrainment is not affected.
A thought to ponder - 'the shrill flutes give me a headache'
Is it the flute sound or your reaction to it that creates the headache?
peace and joy
H
