Re: [X-logic-strategy] Strategy update note

[Neil N. <n_n...@pa...>]

Roger,

Please excuse me for not getting back to you earlier.  I
have been doing work on one of my primary projects that
is the complete Fourier reduction of common music or
natural sounds.  The purpose is to translate audio to a
Fourier description upon which operations may be
performed and then back to the audio.  Though there
may be standard approaches for doing this, there do not
appear to be any easily available that are sufficiently
precise to, say, reverse the combined waveform of an
arbitrary small collection of frequencies (usually not
unit frequencies) back to the Fourier description from
which the waveform has been generated within an error
difference below a reasonable level of audio detection,
i.e., to a point indiscernible by the ear.

This is not a project of relevance to X-logic, but is, I
believe, a very fundamental project in the human-
computer audio interface such that if the objective could
be achieved, there would be significant and widespread
applications.  What we hear is more immediately to us a
Fourier description (translation) such that we can see the
single waveform audio signal as an encoding of that
description.  And then the raw description would be
analyzed for structure similarities (pattern recognition) that
may become text in speech recognition or the sound of a
flute as against that of a violin; we hear/recognize sound
sources and certain kinds of information.

The task is one of noise reduction: beyond the basic
Fourier analysis, as that basic analysis still exhibits a
significant amount of noise and a description much larger
than started with, what are those frequency, amplitude,
and phase functions that will push the noise (primarily)
and the description lower?

As you can see I can go on at length about this but I
also think your project is important in that I would say
information generally has a logic description.  The
_meaning_ of an expression may be seen as the conse-
quence set in the context/theory of that expression.  This
then suggests that there may be some fundamental logic
application that could be applied to expressions for the
purpose of determining meaning.  And then because there
is a large and growing volume of computer based
expression, there could be significant and widespread
use of such an application.

My project is to identify a utility that is the maximal human
hearing information interface, whereas I think of your project
as the utility for representing expression meaning.  Once I
get my application to a useable condition, I could then go
to the large number of audio-related industries in my area--
I live in the middle of one of the largest (if not the largest)
concentrations of such industries in the world--and show
them the significant increase in audio control and processing
capabilities provided by my application.  My ideal logic
application, would be much like an extension of common
web search engines that would identify, assemble, and
condense web material according to my objectives that may
be given in a back and forth manner (perhaps very detailed)
as we are doing here.  Also I would want it to project or
prototype solutions.  It would gather information and solve
problems or be a key component of such an application.

But anyway, I need to begin analysis on a kind of cross-
talk distortion frequencies have on each other as seen in the
Fourier analysis: How is the distortion reduced for two
arbitrary frequencies, and then three, and so on?  And then
as it seems that this class of question is essentially a search
for an optimal function in a moderately bounded space I
should be able to identify a general search procedure in
which my current programs can be embedded.

But I am interested in your project and look forward to
your consideration of the focussed application.

Sincerely,

Neil Nelson


> Here's a brief note on my present view of the X-Logic
> development strategy.
>
> X-Logic needs I believe to be focussed on an application
> which can deliver worthwhile functionality early.
> Then the higher level stuff can be driven by that application,
> bottom up.
>
> I propose that this should be an X-Logic query engine
> implementing a useful fragment of a an X-Logic query
> language, for use in the MaD portal.
>
> The X-Logic query engine would eventually be a separate
> project in its own right, but not for some time yet.
>
> The present work on the web site will have to be transferred
> out of X-Logic, because it is based on GPL code and
> cannot therefore be issued as part of the X-Logic project,
> which is not GPL.
>
> I shall start off the MaD portal as a sourceforge project
> from the existing hacked phpnuke.
> Then the X-Logic site can be changed to use the MaD
> website as a comment/forum server.