Those electrical impulse to your brain, I believe, has been seen to be the exact same impulse for hearing or touch, or taste are the same but they are networked through to the area of the brain for receiving the taste via those taste buds for salt, sweet, bitter, or other; salt is the same signal as butter. Then what we "see" is a limited band width or all the cosmos light. Frequency and Vibration.

https://beforeitsnews.com/prophecy/2023/10/new-david-icke-the-man-they-seek-to-silence-2545630.html