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Re: Auditory wheel
On Mar 18, 2010, at 5:22 PM, Michael H. Coen wrote:
I'm looking for the auditory equivalent of a color wheel. Namely, a
parametrized, continuous method for generating a series of sounds that
form a "perceptual loop" that has no perceived gaps.
Hiroko Terasawa did some work on this problem a few years ago.
The color wheel works because it shows all colors in a perceptually
relevant space. It's just a three-dimensional (or four if you are
blessed) space and you can easily move between points in straight
lines. It's a complete model.
There is no equivalent in the auditory space, yet.
The first two dimensions of an auditory space appear to be pitch and
loudness, and then something related to timbre. Terasawa showed that
low-dimensional cepstral coefficients are a good representation for
static timbre sounds. With such a representation one could smoothly
move from one sound to another in timbre space. The papers are online
Unlike previous work on timbre spaces, she started with a sound
synthesis procedure and then measured how parsimonious the sounds were
with respect to a linear perceptual space. That space might be close
to your desired wheel.
Let me know if you have questions.