Most paranormal investigators chalk up music that seems to come from nowhere in a location to just residual sound. Sound does bounce back and come back sometimes to its location or move off as it is deflected in another direction to another location. We all know the deal with sound waves and how they can travel in this manner. However......
There is more to the phenomenon than we might think. For instance, when I hear a spirit voice and cannot tell what it is trying to say I often ask for a song to get the message across. Then if they do produce music in any form and the sound has words that I recognize, I can discern the message sometimes. For example: A spirit at one home sang the old "My Bonnie lies over the ocean" song to me, and when i went out on a limb to ask the client if it meant anything he said that Bonnie is his mother’s name and his grandmother sang that song to his mother when she was growing up. This was the spirit's way of letting us know who she was, and that she was his grandmother.
Why does music work this way? Music has different tones that permeate the atmosphere and come across on the airways from the other side to ours, better than voice vibrations. Even music playing very low can be heard well enough to most times recognize the song. Then a spirit can get their message across easier if the person listening is so inclined as to ponder the source or meaning of what they are hearing. Sometimes the music is audible at a low level in your home usually at night when things are quieter. Sometimes the song will play in your head for no reason and seemingly not want to stop. Sometimes two people will get the same song playing in their head at the same time, in the same place. Spirits can communicate telepathically as well as audibly. Music is an easy way for them to get that sound to carry across the airways.
Some things act as transmitters for sound for spirits. The most common are computer speakers and believe it or not one of the best is the window unit air conditioner which produces high levels a certain kind of noise. It is the perfect vehicle for transmitting sounds from other dimensions. I have heard music coming from my window unit and so have many other people. I know that a singing air conditioner sounds really out there to some people. But once you experience it for yourself, it gets you thinking and wondering as to the source of that transmission. When it is just a voice singing with no music it is even more unsettling, as you can't say it might be a radio station transmission that the AC unit somehow transmitted.
Spirits will turn on a stereo when a particular song is playing or a TV when something is being broadcast that gets their message across, so when something like this turns on in your home by itself, pay attention to what is coming over the air at the time. It just might be a message for you personally.
In another instance a spirit sang his favorite song to me and through that the family was able to identify who the spirit was. Music has a way of traveling and penetrating the ether in a way other sound waves just don't. I am including a passage from another author which contains information on the concept of the Music of the Spheres, to enhance understanding of the role music plays in our world. Her name is Stefanie Chase and she is a musician and composer.
What is the "Music of the Spheres?"
(Notes from a chamber music program presented by the Society at Merkin Concert Hall in New York, October 2005.)
The phrase "music of the spheres" refers to the intertwined relationship between the structures of music and those of the physical world, and a conscious awareness of mystical or spiritual qualities being transmitted through composed sound.
All music consists of a form of dualism, an aural yin and yang in which consonance is inextricably linked with its complementary force of dissonance; one does not meaningfully exist without the other. Dissonance provokes a form of tension - an unsettled relation in the notes of music - and is relieved by the consonance of resolution. We hear this whether we are listening to Bach, Mozart, Bartók or Applebaum, although the balance is often shifted towards dissonance in post-20th century music, perhaps in reflection of societal conflicts.
Pythagoras is credited with having discovered the physical relationship, expressible as ratios, between mass and sound. He is also credited with having invented the monochord, essentially a stretched gut string on a soundboard with moveable bridges, for testing harmonic properties and their rapport with numerical ratios. (We will hear a monochord in Edward Applebaum's Dirt Music, which may be the first instance ever of its use in composed music; more recent instruments with basic similarities to the monochord would include the Japanese koto and the Chinese ch'in.)
The octave ratio of 1:2 means that a mass, such as a string of any material, will produce a frequency an octave above the pitch of its full length when it is reduced by one half. For example, the open 'A' string of the violin sounds that pitch at about 440 vibrations per second. When the string is "stopped" by the violinist's finger so that only half of its original length is vibrating, it sounds an 'A' that is an octave higher and vibrating twice as quickly. Simply stated, to play this musical interval, one part of the string length out of two parts total (the ratio 1:2) is set into vibration. The ratio for the fifth is 2:3 (two parts out of three are vibrating) and that of the fourth is 3:4.
Pythagoras and his followers believed that a universal philosophy could be founded in numbers. They differentiated three types of music: the music of instruments, the music of the human body and soul, and the music of the spheres, which was the music of the cosmos. Geometric shapes and even orbiting motions could be linked to this philosophy – indeed, Pythagoras could arguably be the first proponent of "string theory" as a tool to understanding the universe – and the important symbol of the tetractys contains the numbers of the perfect musical intervals of an octave, a fifth and a fourth.