@Shadow Self said
"When I used to do ritual, I got good at it so that at one point I couldn't even hear the background noise, it would be there, and then I would get into the ritual, and I would only hear the ritual. I would sometimes have music on and I remember not hearing that."
I have experienced a similar effect.
To the point that upon completing the ritual it would feel as if the music suddenly flowed to fill in the gap.
Often resulting in a lil dance 😄
EDIT:
As far as what kind of music to use, what has worked best for me is something without lyrics and a steady beat.