In fact, quite a lot of what I do has to do with sound texture, and, you can't notate that. You can't notate the sound of "St. Elmo's Fire." There's no way of writing that down. That's because musical notation arose at a time when sound textures were limited. If you said violins and woodwind that defined the sound texture; if I say synthesizer and guitar it means nothing - you're talking about 28,000 variables.