Hi scruffy,
Welcome to Neuro Talk what you are describing sounds like you are having audio and possibly photosensitive seizures just like I mentioned to Maya.
What's happening with you is that the right temporal lobe of your brain is taking control of you and causing the seizures. The reason why I say it's the right temporal lobe of your brain is because that's the area of a persons brain that controls music. How we listen to it, play instruments, sing, etc. anything related to music is controled my the right temporal lobe. The next time this happens to you take a cold wash cloth and put it on your face and the back of your neck this will stop the neurons in the brain from firing up and leading into a seizure. Here's wishing you well and May God Bless You!

Sue