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From: jungledmnc on 30 Mar 2010 16:10
Hi there,

I have pretty well working LR4 crossover created using 2 biquads (for audio
DSP). It has -24dB / oct steepness (I guess). I wanted to lower the
steepness to say -12dB / oct. I guess I could use LR2 instead, but could
you point me out, how to implement it?

I also heard steepness can be changed using Q. Is that really possible?

Thanks in advance.
jungledmnc
From: Greg Berchin on 30 Mar 2010 16:29
On Tue, 30 Mar 2010 15:10:18 -0500, "jungledmnc"
<jungledmnc(a)n_o_s_p_a_m.gmail.com> wrote:

>I have pretty well working LR4 crossover created using 2 biquads (for audio
>DSP). It has -24dB / oct steepness (I guess). I wanted to lower the
>steepness to say -12dB / oct. I guess I could use LR2 instead, but could
>you point me out, how to implement it?

LR2 is two first-order filters in series.

.. 1 s�
.. ------ LP; ------ HP
.. (s+1)� (s+1)�

>I also heard steepness can be changed using Q. Is that really possible?

Nope.

Greg
From: Greg Berchin on 30 Mar 2010 20:25
On Tue, 30 Mar 2010 15:29:08 -0500, Greg Berchin <gberchin(a)comicast.net.invalid>
wrote:

>LR2 is two first-order filters in series.
>
>. 1 s�
>. ------ LP; ------ HP
>. (s+1)� (s+1)�

And don't forget to invert the polarity of one or the other.

Greg
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