2. Jazz is barely a genre anymore there's so many different sub-genre's and movements within it that actually using the term how you did is disingenuous.
3. You did the same as above with about the same effect for "pop music". Seeing as you addressed harmony, you'll actually find that there are lots of common harmonic (chord) progressions that are shared between the two idioms. They reflect each other more than they are different to each other. If you really wanted to make the point you were trying to make I'd suggest looking for some form of obscure ethnic music (Pakistani throat singing or Indonesian Gamelan perhaps) that has not really had much chance to mix with western music and absorb its paradigms.
I think a big part of music is familiarity which is why you see the overuse of the I, V, vi, IV progression. So to me Xavian sounds like chromatic played out of tune. Nice idea though.
It's not just that; the musical intervals we tend to favour are based around natural resonances and constructive / destructive interference. Hence why a perfect fifth sounds good and a diminished fifth jars; the waveforms don't compliment each other.
I'm willing to be persuaded and don't claim to have made a large study of this but I'm yet to hear a microtonal tuning that didn't just sound off. The sounds actively work against each other because the resonances just aren't there.
(I'm aware in this that modern keyboards are even tempered and so we don't actually _quite_ have perfect intervals any more, but the differences at that level are far smaller.)
Don't be afraid to be right. I did study music theory and I can confirm that the intervals as we know them are just a way to modelize the natural physical relationships between the waves we hear. It is a way to remeber where to put your finger on a violin to make the two string sound good together in a given harmonic context.
One can alway declare to prefer microtonal or whatever invention, but the level interference (or harmony) between pitched sounds can be determined rationaly. This, for once, is not placable under cultural relativism. That's why it is probable that quater tones in Indian or Iranian music are not really tones, and are more like little bends to the natural scale.
(This fact do not please avant-gardists, because it means there is roughly nothing new to invent in this field, but reality is not supposed to always be pleasant, right?)
By the way, I couldn't read the OP (blocked), sorry if my contrib is not related enough.
I'm thinking about a music application that lets you place tones in arbitrary locations on a continuous line (representing the tone space) and assign them keys on the keyboard.
Cool. I've started fretless bass, and reading about accommodations you make for playing with e.g. vocalists who run flat more often than sharp, or upper register of piano that are sharp.
http://www.youtube.com/watch?v=60SYLdMYvcE – check out the keyboards!