BBC has an article, "Thinking Up Beautiful Music," that is on developing a way for disabled composers to write music merely by thinking the notes. The scientist in the story is working to develop the software to get the computer to recognize and second-guess the note that the user is thinking of in a creation.
It is fascinating stuff and there is a video on the link as well to watch. Frequencies are vibration and vibration and frequency is pitch, whether we can hear it or not. I believe our thoughts are literally music already. I am excited that someone is exploring the arts and thought-creativity. This is just another development that makes our future so exciting!
All the best to You!