The best music to listen to when writing is without lyrics, wordless. It really should be a stream of sound. Soundscapes work well, Jazz does not, which is funny because jazz sounds like it should induce creativity. But it’s erratic, formless at times, wild. It’s a good thing normally but not when writing. Music that contains loops or repetition works very well. It sets a certain space for the mind to go round and round in, generating new ideas and testing them all to the same rhythm. It’s one of those little things in life that is quite interesting. Really what you’re after is something that can set a mood and sustain it, which is why loopy stuff works well or playing the same song or album on repeat.