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- From: owen@emds.enet.dec.com (Steve Owen)
- Newsgroups: rec.audio
- Subject: Re: polarity inversion
- Message-ID: <1992Dec29.210759.17315@e2big.mko.dec.com>
- Date: 29 Dec 92 21:05:14 GMT
- References: <92364.114116U37426@uicvm.uic.edu>
- Sender: usenet@e2big.mko.dec.com (Mr. USENET)
- Organization: Digital Equipment Corp.
- Lines: 36
- Organisation: Digital Equipment Corporation, Maynard MA
-
-
- In article <92364.114116U37426@uicvm.uic.edu>, U37426@uicvm.uic.edu writes...
- >
- > Just how does polarity inversion affect the sound of a stereo? I have
- >never had a system that had this feature. I have no idea what it does.
- >Could somebody explain? thanks!
-
- I assume you're refering to the 'mini-review' of the Adcom GCD-600 CD player I
- recently posted... right?
-
- Lets say you fed an audio signal into your speakers... a sine wave for
- simplicity.
-
- In a 'non polarity inverted' system, let's say that the sine wave started with
- a positive pulse, then went negative, back to positive, and so on. The
- speakers would start by moving out, then sucking back in, then moving out
- again.
-
- In a "Polarity inverted" system, that first pulse would send the speakers
- sucking inward, then out, then back in again.
-
- The reason for a "polarity inversion switch" is because some recordings are
- recorded with reverse polarity and some people (myself included) would like
- them to be normal again.
-
- I believe that if you invert one channel but not the other, you get what's
- called "out of phase" sound.
-
- Later...
- Steve
-
- **************************************************************************///**
- Steve Owen ///
- owen@emds.enet.dec.com \\\///
- \XX/
- *******************************************************************************
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