> I remember reading that von Neumann was a fan of turning on the TV or radio to very loud volumes when he was working at home. Likely to achieve the same effect.

There is a whole genre of YouTube videos that is just somebody walking in the rain in a cityscape for 3+ hours. I put the video on on my TV, to get both a sense of calm and also a sense of exploration/movement. Something about the coffee shop ambience videos just no longer tickles my mind. It’s best to pair with reeally slow, long music, such as Subaeris - The City in Rain (56 minute long ambient “dreampunk” song). There’s typically a moment in this process that I feel my mind de-tense.. allowing the real work to begin