Both are vibration.

You shall behold the color harmonies." Presently the connection between sound and color began to be obvious.
Each note had its color, and as that note was sounded the color appeared in a thousand places.
It was Eastern music.

It filled the cavern, and as the pulse of it quickened the light danced, colors shooting this and that way like shuttles weaving a new sky.

But there were no drum-beats yet, and the general effect was rather of dreaminess.
When the old gray-beard's voice boomed out at last from the ledge above us, and light and music ceased simultaneously, the effect was nauseating.

It went to the pit of your stomach.