Hi again, try this, go to contacts, select the contact, at the top of the screen is a pen icon, select this and at the bottom of the screen is the "Ringtone" field, select this, it will bring up all the ringtones on your phone, at the bottom is "ADD" touch this and it should display all the music you have downloaded onto your phone, just select the tune you want and then select "Done" and then save on the next screen. Phil
p.s. This is in Marshmallow