THIS is computer music: Ge Wang at TEDxStanford
You're a very personable young man, Mr. Ge Wang, but your "music" lacks, inherently, charm. And what, you may well ask, is charm? It is, to begin with, in Latin, a spell or incantation: Carmen--moving the emotions, indeed the very soul, of the hearer, as if by (and this is a little unfair) magic. Indeed, sometimes wordlessly, or silently--especially in the plural, and when referring specifically to a woman's (or a boys')--"charms." But usually charm is expressed in music by an odd little quirk or unexpected twist--a droll dropping, or peculiar upward inflection, of the voice--that gives character to a piece, and makes the heart beat faster for a couple of moments; of which sort of trick, gimmick or business Englishmen, who lived in the time of Elizabeth the First and James I, always seem to have had the knack. So I tell you what: Go and find a copy of William Byrd's "O Mistress Mine" (theme and variations)--It's in the Fitzwilliams Virginal Book--and teach yourself to play it. Forget about the words--No one knows what they were any more, and the words that have been proposed to sing to it in the past century or so are nauseatingly stupid. But the tune is not stupid, and Byrd's repeated setting of it, and changes on it, are dazzling, wicked-smart.
Anyway, what you've got to understand, Mr. Ge Wang--and you give no indication of understanding it--is that is there is no music (no real music) without charm. There has, of course, ever since Igor Stravinsky turned the Banshees loose in the orchestra by writing le Sacre du Printemps (in 1913), been a stinking shitload of charmless music in the world--but it isn't real music. Before the advent of the First World War, however, there was a lot of charming music in the world--and maybe nothing more charming, end to end, than Schubert's Trout Quintet: Which is full of good tunes; which are repeated, but never too often, and you never get tired of them.
And as for writing your own tunes--tunes, Mr. Ge--You might trying singing them to yourself before you try them on your ocarina or theramin (if that's what it is).