Multimode filters, Part 2: Pole-mixing filters

Posted by & filed under Filters, Matrix12, Oberheim, Synth DIY, Vintage synths, Xpander.

Last time we looked at reconfigurable filters, filters that include switches to rearrange parts of the circuit during normal use. However, that’s not the only way to produce different responses from a single filter circuit. This time, we’ll look at another approach: pole mixing. “Pole mixing”? It sounds like stirring a cake with a broom handle… Either that or a DJ doing a set up a flagstaff, right? Nope! You’ll have heard people talking about filter “poles”. Without going into the… Read more »