[sdiy] Oberheim Xpander Multimode VCF Question

[Steven Cook]

Hi,

Is it possible to get a -24dB/oct allpass response out of an Oberheim 
Xpander type of 4-pole filter arrangement? I've got the following for 
an -18dB allpass, from a post by David G. Dixon...

input + pole1*3 - pole2*6 + pole3*4

Which seems to work fine (in software).

Regards,

Steven Cook.

http://www.spcplugins.com/
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