As Dave Smith is dreaming up his next new synthesizer, I imagine him tossing and turning all night long. Finally, his wife turns to him and asks, "Honey, why can't you sleep"? He answers, "The number, I can't come up with the number. I've used almost all of them: Pro One, Tetr4, Mopho x4, Prophet 5, Prophet-6, Prophet '08, Prophet 10, Prophet 12. If I make a Prophet 13, no one will buy it, for fear of bad musical luck!"
In trying to guess what Dave will make next, the first question that comes to mind is the number of voices. The poor guy; he's almost out of options, other than going with odd numbers. A Prophet 7 - I don't know. It just doesn't have that ring to it. I think the next number should be 10. Why can't he re-use an instrument name?