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200e

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Message

Re: 210e -- audio signal phase reversal?

2008-04-28 by tmeade1974

I found this in the archives:
http://launch.groups.yahoo.com/group/200e/message/104

"You can also phase shift the filtered signal using spacial dynamics in
the 227e. B and C are 90 degrees out of phase from A and D is 180
degrees out of phase from A. Mix the filtered signal back to the
original signal - voila, a phaser. Try it with 1 signal sent to all
channels of the filter with each channel set to a different center
frequency."


I seem to remember another post concerning the same issue... maybe in regards to the 
259e sine output???....  but I can't find it at the moment.  I don't have a 227e so I cannot 
comment or test it out.

-tom


--- In 200e@yahoogroups.com, "nicholas_kent" <zaum@...> wrote:
>
> 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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