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Path: utzoo!watmath!watnot!watdcsu!herbie
From: herbie@watdcsu.UUCP (Herb Chong [DCS])
Newsgroups: net.audio
Subject: Re: Re: Spring cleaning Preamps (actually CD vs LP)
Message-ID: <1438@watdcsu.UUCP>
Date: Thu, 30-May-85 10:24:30 EDT
Article-I.D.: watdcsu.1438
Posted: Thu May 30 10:24:30 1985
Date-Received: Fri, 31-May-85 02:25:23 EDT
References: <141@utflis.UUCP> <301@moncol.UUCP> <494@edison.UUCP> <142@harvard.ARPA> <358@petrus.UUCP> <336@moncol.UUCP> <359@petrus.UUCP>
Reply-To: herbie@watdcsu.UUCP (Herb Chong [DCS])
Organization: U of Waterloo
Lines: 36
Summary: 

In article <359@petrus.UUCP> karn@petrus.UUCP writes:
>Can somebody PLEASE tell me what the terms "imaging" and "dimensionality"
>are supposed to mean? Or are they used because they're deliberately vague?
>
>Phil Karn

well, i might as well be the first to be flamed.
	"imaging" commonly means the reproduction of stereo (or quadrophonic
	etc.) sound such that instruments being played can appear to be placed
	at specific locations in front of (and sometimes behind) the
	listener.  this includes, left/right, vertical and near/far
	positioning.  the effect is primarily psychoacoustic and depends
	on aural cues such as the relative loudness of the sound
	coming from the two channels, the relative phase of the two
	signals (from the same instrument), the frequency balance (spectral
	energy received at the ear), and the reverb (both recorded and
	created by the room).  a system images better when it is easier
	to locate instruments with high precision, and the instruments 
	do not wander with time unless the effect is deliberately recorded.
	this does not imply that the actual instruments were actually
	in the relative positions perceived, although this is usually
	the case.

	"dimensionality" usually refers to the apparent size of the
	stereo image, although it is also used by some to include the
	amount of low level detail present even when the music (i assume
	you listen to music for these tests) is being played loudly.

Herb Chong...

I'm user-friendly -- I don't byte, I nybble....

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