I'm a brain.fm fan too. It blocks out the internal monologue and, like you say, is surprisingly effective at entering a flow state. I'm a fan of free jazz and I

I'm a brain.fm fan too. It blocks out the internal monologue and, like you say, is surprisingly effective at entering a flow state. I'm a fan of free jazz and I've found it has a similar dissonant effect. Ornette Coleman is a great place to start.