As my guitar gently bleeps

[From Rick Marken (960508.1830)]

Peter Cariani (960506.1000 EST) --

You seem to be arguing that the temporal pattern of neural impulses
can be a "code" for a perception. For example, you suggest that a
temporal pattern of neural impulses can be a code for the perception
of pitch. I know that there is evidence pointing to both "place" and
"time" coding of pitch. But I am curious if you have ever considered
the implications of these theories of neural coding for a control
model of control of pitch.

One very common example of controlling pitch is tuning a musical
instrument (a guitar in my case). Have you ever tried to build a model
that brings one pitch perception into a match with a reference pitch?
The input to the control model would be a tone frequency that can be
varied by the output of the "tuner" (the control system). The
perceptual representation of this tone would, by your theory of pitch,
be a temporal "code" of the tone; this code would presumably change as
tone frequency changed as a result of the tuner's output (turning a
peg on the guitar). I presume that this temporal code would have to be
continuously compared to a reference signal of some kind (presumably a
temporal code of the desired pitch). The comparator would have to be
able to continuously measure the difference between these codes and
this difference would have to be turned into an output that increases
or decreases tone frequency, as necessary, to bring actual and
reference pitch (codes) into a match.

We know that people can tune guitars (control pitch); I would like to
see a model of tuning that is based on control of pitch codes. If
pitch were represented by signal magnitude (measured as neural firing
rate) such a control system would be trivially easy to build. I would
like to know what it takes to build such a control system on the basis
of temporal patterns of neural firings.

Bill Powers (960507b) on thinking about thoughts:

Since nobody has done much posting since Bill posted this beauty , I
suppose it left eveyone in the same state as it left me: speechless