I tend to focus when I work on anything and I find music disruptive to the process. I think it may be largely a matter of conditioning. I envy people who can focus narrowly on the object of their work with distractions around them. I have never mastered that art.
“I just got out of the hospital. I was in a speed reading accident. I hit a book mark and flew across the room.” ― Steven Wright
I listen to classical, sometimes Dylan Mama & Papas, Pumpkins or Bush help me for some reason get out of a creative funk. Also when writing about the past I listen to music from that time period to help. I do remember one time I ended up typing all lyrics to Tonight Tonight, in the middle of my chapter without realizing it.
I have to have music to write. I can do without it for rewrites, but not for the first draft. I have an entire play list specifically for writing and will switch songs depending on the scene and mood of what what I'm writing. Almost every song has lyrics and I'm quite capable of singing along with the lyrics even while totally absorbed in my story and typing it out on the screen. The lyrics never get in the way.
Hey I just love to listen music while doing some other work (it might be at work in office or writing at home) because it will just keep on relieving us from the mind stress and also help us stay boosted with enough energy.