Xref: utzoo rec.audio:30140 comp.dsp:1465
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewse!cwpjr
From: cwpjr@cbnewse.att.com (clyde.w.jr.phillips)
Newsgroups: rec.audio,comp.dsp
Subject: Re: Good speaker + DSP == perfect speaker?
Summary: GMTA
Message-ID: <1991Mar25.153333.17660@cbnewse.att.com>
Date: 25 Mar 91 15:33:33 GMT
References: <1991Mar22.171203.8665@sco.COM>
Followup-To: poster
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 40

In article <1991Mar22.171203.8665@sco.COM>, jfischer@sco.COM (Jonathan A. Fischer) writes:
> 
> 	Something that's really caught my interest lately (I suppose
> it was after reading a review of the Meridian D6000 "digital speaker")
> is the possibility of the following scenario:
> 
> 	You buy a good speaker with no glaring flaws.  Its frequency
> response is pretty good, varying +/- a couple of dB over yer basic
> 40-ish to 20K Hz range.  Its phase accuracy varies +/- <n> degrees over
> the spectrum (whatever's typical).
> 
> 	So you buy a programmable DSP "package," containing the DSP
> unit (which also performs as a frequency generator), and a mike or
> Sound Pressure Level meter.  You set up the SPL meter in your
> listening spot, press the "setup" button on the DSP unit, and it
> commences to send frequency sweeps through your sound system, reads
> the levels and the phase response.  Finally, using these variables, it
> 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?
> -- 
> Jonathan A. Fischer		SCO Canada, Inc.
> jfischer@scocan.sco.COM		Toronto, Ontario, Canada
> Usenet's first law of flamodynamics:
> For every opinion, there is an equal and opposite counter-opinion.

Jon,	
	I had the same dream about 2-3 years ago, when I first
got interested in DSP's. Yeah I think this is possible.
A good high end audio product. 
	Another variation I thought of is to incorporate a listener
profile and do the same sort of thing to get the speaker responce
flat to a individuals ears...

	Amazing how dreams can come true, isn't it?
Clyde