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Index last updated: 2026-04-28 22:38 UTC

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Re: 210e -- audio signal phase reversal?

2008-04-28 by nicholas_kent

Doesn't make much sense to me (But I don't own any modules). The 227e
is a quad channel device. In general no one defaults audio as far as I
know to 90 degree phase shifts  to do quad. All you will wind up with
is more potential of cancellation  in an acoustic space.  And 90
degrees for that matter probably requires a pair of allpass filters to
achieve. It's not something you can get without filters as far as I
know compared to just inverting the polatity for 180 degrees (though
filters could do that too).

 My guess is people are thinking along these lines because if you are
mixing  quad audio you  might very well want to hit your VCAs with  90
degree quadrature of a *control voltage* in order to do "circular" pan
effects. Or perhaps someone just wants to identify the speakers in
numbers rather than ABCD if they represent a quad space


--- In 200e@yahoogroups.com, "mritenburg" <mritenburg@...> wrote:
>
> I might be wrong, but I have always assumed that on the 227e, positions 
> A, B, C, and D are 90 degrees out of phase from one another.  So C is 
> 180 degrees out of phase from A and D is 180 degrees out of phase from 
> B. 
> 
> Matt
> 
> 
> 
> --- In 200e@yahoogroups.com, "Matt Carpenter" <matfhew.carpenfer@> 
> wrote:
> >
> > Hi all,
> > I was just wondering if the 210e allows phase reversal of the audio
> > signal or if phase reversal is possible via other means, specifically
> > for the purposes of feedback/feedforward experimentation.
> > Thanks!
> > Matt
> >
>

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