Pachelbel's Canon is one of the most famous classical music. You may have heard this music at the wedding party etc. I expanded this music ten or more times, and made it an ambient music. It is said that music is an art related with time and the memory. Or you can say that you remember the sound you heard before when you hear sound, and compare them. So what will happen if a tone is long enough that you forget the previous one? Check it by yourself.