"Maryetta Campbell" linked to: http://www.dezeen.com/2009/06/22/radiolaria-pavilion-by-shiro-studio/ Thanks. I was thinking of what I would want to do with a printer like that in news:/rec.music.theory (in a thread about music and physics), and that is make three-dimensional sine-waves with a surface of rotation: Turn music into a pipe; might make an awesome muffler. Hey, and my sixth version of http://ecn.ab.ca/~brewhaha/font/Saffron_Karaoke_Duet.wmv (quartet, currently) might pan out to hav _good_ five part harmony. I can listen to my current four-part version five over and over. Hopefully, other people can stand it by now, a year and a half after my first release. Harmonies are in it that I do not like. If recasting all five parts from a series of perfect fourths (4/3) will work, then those harmonies will go away next week. If not, then reordering the parts from where they start now will work in two weeks. If not, then tuning my starting chord by ear (over the space of one octave) will work in less than three. Failing that, I will leave the sound alone, improve the colouring, and hope my friends like the disk with six duets picked out of the quartet. My current strategy improved my melody.and my beat. Version seven will feature contrasting instruments instead of sine waves, so that it is easier for singers to pick out their part. I do not think there are many five or ten cylinder enjinz, so a muffler made out of these sine waves would need to glide in the surface of rotation, so that there only has to be one pipe. I think the volume in the first wave should equal the volume in a car's piston chamber (total displacement/cylinders). I would be effectively speeding the music up to minimize the number of oscillations, then scaling it to device resolution and length of pipe I want. Before I degrade it to muffler status, I *would* see what it does when I plug one end and blow over the other; might make an awesome dijeree duu (however you spell that). *This is literally a pipe dream*.