I find most the Objectivists I know love hip-hop and rap, in particular artists like Fort Minor and Kanye West. These genres seem to be the ones that have the most rhythm and melody, and to me the non-"let's have sex with girls" ones generally have a good sense of life.
What do you guys think?
(Sorry for my bad English.)
There is no such thing as Objectivist music. Music does not flow from a philosophy. It comes from a composer's mind, and Ayn Rand was not a musical composer.
That said, Ayn Rand had strong tastes in music, as well as firm ideas about what constitutes music and what does not.
Objectivism is a philosophy -- it is a description of Ayn Rands philosophical ideas, not of her musical tastes.
Ayn Rand held that melody is the essence of music. Melody suffers if pitch becomes irrelevant (as in rap), and it also suffers if rhythm becomes irrelevant (such as in ambient audio).
I suspect Ayn Rand would not consider rap to be music. "Sound that's exciting or pleasant to listen to" is not a definition of music. She might even consider rap to be a subversion of music as such, just as "No Skin Off Your Ass" was a subversion of play-writing, in The Fountainhead.
Rap could be reasonably be considered as particularly rhythmic poetry. Whether any given poem is consonant with Objectivism depends on its content.