Well, that's really good, eta. I had some of that "voiced velar fricative" stuff in college. But I think this is going to be more complicated than I'm going to want to fool with, learning all those curlicues and all. I enjoyed learning a couple of new words: pulmonic and apical. One of the terms made me grin: "Creaky voiced". If I wanted to undertake a study intensive enough to learn all of these, I think I'd need to hear them, so I could associate the sound with its correct symbol.