Mental activity that isn't thought
Sensuous.
It means to be perceived or affected by the senses. It implies no thought or consideration, merely perception. Do not confuse with sensual, which has a more lascivious or hedonistic connotation. Note though, that this is an often conflated pair of words and your meaning may not get through to the entire readership.
In its whole capacity, the mind is not limited to thinking, but also to sensuous activities, which include experiencing music and meditation.