These are the most common brainwave frequencies.

(….excluding those ranges higher than beta such as gamma)

BETA waves 13 to 30 Hz the fastest waves, most commonly found during our waking state, associated with outward awareness, engaged mind, arousal, actively perceiving and evaluating forms of data through the senses; also present with fear, anger, worry, hunger, and surprise.

ALPHA waves 7 to 13 Hz associated with non-drowsy but relaxed, tranquil state of consciousness, less engagement and arousal, pleasant inward awareness, body/mind integration, present during meditation and states of relaxation

THETA waves 3 to 7 Hz associated with increased recall, creativity, imagery and visualization , free-flowing thought, future planning, inspiration, drowsiness, present during dreaming and REM states

DELTA waves .1 to 3 Hz associated with deep dreamless sleep, deep trance state pituitary release of growth hormone, self-healing, present during deep levels of non-REM sleep.

So during Beat is not great for creative work. I find that during the afternoons when my productivty goes down, it’s easier to get dragged into this state. When quite returns at night, sometime i find myself working productively.

Just a cool chart you can reference.