Hi Russell,
So to be clear, you're creating a Linkwitz-Riley crossover?
http://en.wikipedia.org/wiki/Linkwitz%E2%80%93Riley_filter
On 8/02/2013 6:05 PM, Russell Borogove wrote:
> I have two digital 12dB/octave state-variable filters, each with
> lowpass/highpass/bandpass/notch outputs; I'd like to use them as a
> 24db/octave low/high band splitter.
You didn't specify which state-variable filter you're using. There are a
at least two linear SVFs floating round now (the Hal Chamberlin one and
Andy Simper's [1] )
Will I be happy if I use the lowpass of the first filter as input to
the second, then take the lowpass and highpass outputs of the second
as my bands
The lowpass output of the first filter presumably has a zero at nyquist,
so I don't think this is going to work out well if you highpass it.. you
could try though.
or do I need to put the low and high outputs of the
first filter into two different second stage filters?
That's my impression.
Ross
[1] http://www.cytomic.com/files/dsp/SvfLinearTrapOptimised.pdf
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