I haven't done this exactly, but I've thought about the "conversion" you're talking about. A few years ago, I toyed with the idea of converting Italian to music, specifically, each syllable = a measure. Since Italian has a relatively simple syllable canon (s)C(l,r,j,w)V(N,Gem), it seemed pretty straightforward at first, but quickly it got complicated. So my advice is, come up with a relatively simple phonemic inventory and phonotactics, something that could easily translate to the diatonic scale (if that's what you like your music in).