[CM] translating spirals into music CLM

[Bill Schottstaedt]

> can you tell me how I write this if I were to use the 9 speaker set up I described earlier? 
> Would I need a soundcard with 5 (or 9) outs to be able to achieve this 360 degree effect ? 

Use 2 4-channel locsigs, one for the floor, the other for the ceiling; write
the locsig output to a frame, rather than directly to the output file, so
that you can divvy it up to arbitrary output channels.  I don't know about
the other question -- I think to get a good sound placement illusion you
need more speakers than you can imagine -- someone in SF has a
listening space with hundreds of speakers -- a sign that this problem
needs more thought...

(It is odd, to me anyway, that the sound placement illusion is the only
audio illusion I've ever heard that can be as compelling as the visual
illusions -- shepard tones never work unless you're willing to go along,
but a cricket in a box can be incredibly hard to locate -- as you
(unwittingly) move around the box, it seems to be moving around
with you, but to find it, you have to willfully ignore your ears.  And yet,
in computers, nothing in this regard has ever struck me as convincing.)