[LAU] A nice three-band split

[fons at kokkinizita.net]

On Fri, Mar 26, 2010 at 12:48:53PM +0100, Julien Claassen wrote:

> low_pass: LADSPA unique ID: 1891, lowpass_cutoff: 120, stages: 1
> mid_pass: LADSPA unique ID: 1892, band_centre_frequency: 420, BAND WIDTH: 800, 
> stages: 1
> high_pass: LADSPA unique ID: 1890, highpass_cutoff: 920, stages: 1
> 
> Mathematically seen, the three bands just touch.

No, for that the centre F should be 520, not 420.

But then, with stages = 1 you get second order sections
and they will be out of phase at the crossover points.
Stages = 2 may help, but probably give you too much gain
in the crossover region.

In general with this type of filter no setup will
exactly reproduce the input when summing the outputs.

One solution would be LP, 1 - (LP + HP), HP.

What do you want to use this for ?

Ciao,

-- 
FA

O tu, che porte, correndo si ?
E guerra e morte !