Xref: utzoo rec.audio:30111 comp.dsp:1462
Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!emory!gatech!prism!gt0869a
From: gt0869a@prism.gatech.EDU (WATERS,CLYDE GORDON)
Newsgroups: rec.audio,comp.dsp
Subject: Re: Good speaker + DSP == perfect speaker?
Message-ID: <24940@hydra.gatech.EDU>
Date: 24 Mar 91 02:25:22 GMT
References: <1991Mar22.171203.8665@sco.COM>
Followup-To: rec.audio
Organization: Georgia Institute of Technology
Lines: 39

In article <1991Mar22.171203.8665@sco.COM> jfischer@sco.COM (Jonathan A. Fischer) writes:
some deleted...
>sets up a digital equalization + phase doctoring DSP program which
>will transform your sound system, no matter what your room's or your
>speaker's acoustical properties, into one with a completely flat
>frequency response curve, and with zero phase shift across the entire
>spectrum.
>
>	Is this a pipe dream or is it feasible?
>-- 
If anyone has any relevant information on this, _please_email me a copy
of it too.
I am interested in digitally altering not just the whole system response,
but the individual parts. Suppose, by chance, you have a tweeter that
roll off too soon on the low end (maybe you're trying to use 6db slopes)
However, the resonsnce behavior severely complicates attempts to alter
the response. My guess would be that some system of higher order(like 
differenrial equations-analogy) would be required to solve this problem.
However, a digital system, done properly could "numerically solve" the
problem...
I am interested in not only sloutions, but will entertain any theories
anyone has on this subject. I know that there are devices similar to the
ones Mr. Fische mentioned  in development, but have no relevant data.
This type of design seems to offer a chance of "sidestepping" some
of the shortfalls of current audio technology.Until the "better speaker"
comes along, maybe this could"bridge the gap"I know this has little hope
in solving transient distortion problems, but it seems that by removing
a couple of variables from the solution equations the job would be a lot
easier(ie, if the frequency and phase response were correct)...
Neat subject to think about, isn't it?

Gordon.
 

-- 
WATERS,CLYDE GORDON
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp:	  ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt0869a
Internet: gt0869a@prism.gatech.edu