Classical music helps you go deep.
Instrumental classical music helps you create an environment of consistency.
I usually listen to any one track on repeat.
You can find a lot of these on YouTube (search for “extended 1 hour version” of any classical track or musician you like).
These really help keep the work going and enter a state of flow.
A simple piano track can improve mood and hence make us more productive.
Avoid lyrics in the music as words seek your attention.
Music will also help block out other sounds.
Apart from the popular classical music, some of my favorite tracks to work to are: