Re: [Jamin] Re: [linux-audio-user] good spectrum analyser

From: Steve Harris ^lt;S.W.Harris_at_ecs.soton.ac.uk>
Date: 02/23/04 05:18 EST
Message-ID: <20040223101815.GB14728@login.ecs.soton.ac.uk>
On Sun, Feb 22, 2004 at 04:39:17 -0600, Jan Depner wrote:
> That was the point of the outside markers.  They are essentially where
> the effect stops but it splines into them.  On standard parametric EQs
> they use a knob to define where the effect ends.  AFAICT there is no
> difference between this -
> http://www.transom.org/tools/basics/200303.eq.towne.html and
> http://myweb.cableone.net/eviltwin69/smooth2.png.  They just don't have
> markers where the curve goes to 0 (because it has to go to 0).  If you

It only has to go to zero at 0Hz and Infinity Hz, which is what it does -
it may look like zero at some point, but it wont truely be.

> want it to spread more just move the markers.  The question I was asking
> is whether you want it to be more gradual (ie, add more points to the
> spline which is exactly what they're doing).  Originally I just set it

True, but if you set the markers to the ends of the frequency scale
then you also have a very wide bell shape, which is not the same thing.

> to a very small number of points to make it simple.  On the very narrow
> notches there is no way to make it very gradual because you only have a
> small number of points to begin with.  What they were doing that I
> wasn't is going from the marker to the end of the frequency band with
> the high and low pass.

Yes, the narrow ones are going to be hard in any case I think.

- Steve 


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Received on Mon Feb 23 05:19:20 2004

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