Something new? First, define "new"...
Okay. Here we go. A little piece of poignant pontification pertaining to the perpetuation of innovation and it's relation to the stationary, always scary, here-and-therey world of music.
Wait for it...
Chances are, if you explore and research the infinite varieties of not only music, but music's structure and form across all of the world's cultures and culture's musical incarnations, you will run across something that is, if not exactly, at least nearly indiscernably close to what you've come up with on your own.
Someone's idea of running a vintage Delorean over a parking lot covered in bubble wrap, accompanied by two hundred cellos filled with water and a hungry, rabid chimpanzee with gas may produce "music" unlike anything you or anyone you
know has ever heard of, but that someone,
somewhere, has.
As to "music"... each culture inherently devises its own acceptable standards of definition. The work of the aforementioned DeBubElloZee symphony's composer, for example, may be looked upon in the Western world as irritating, stupid and, ultimately, the nonsensical ear fudge of a non-musical schmuck with way too much time, money, and plastic air-filled packing material on his hands. However, another culture somewhere may consider it a fresh breath of air from the usual dronings of their own native tunes, and embrace its sound as the new Renaissance.
Chord structures, scales, and all other notations of the modern-day world differ from culture to culture. What binds them all together is the common perception of the produced acoustics as "music", at least by one group. This perception often transcends cultural limitations, as even works that are considered "atonal" or "non-musical" to one culture can be recognized as another culture's "music"... though perhaps not appreciated as "music" in that culture.
As to the structure of song, it is the same as the definition of "music". There really isn't such a thing. Has everything been discovered? Not necessarily... Voltage Meter rock has yet to see its heyday, RF converters haven't been realized to their full potential as percussive instruments, and 123/167 rhythm is woefully under-used in pop music today. But many things have been done... and as new things are being discovered, current musical terminology stretches to accomodate them.
Does this mean that the above epiphany is, in fact, just that? A new, revolutionary sweep across the musical plain, taking no prisoners as it redefines the very fabric of music itself?
Possibly... possibly not. Time will tell.
In the meantime, where's my bubble wrap?
P.S. - No Deloreans, packing materials, cellists, or gaseous simians were harmed in the posting of this message.