Programming State Variable Filter Behavior on the Oberheim Matrix 12 and Xpander This is NOT a step-by-step tutorial. This DOES show how I set up a couple of patches to get STATE VARIABLE filter behavior on FIXED filter synthesizers like the Oberheim Matrix-12 and Xpander. To be clear, I leave out all the programming steps where I save and rename the patches as you must. This method works on most any programmable, multi-timbral, polysynth where different filter modes are configurable. The downside to this method is the overall polyphony will be cut in half. On the Xpander this means 3 voices. But hey, on the SEM it uses only one voice. 0:10 Intro, what is a State Variable Filter 0:55 How the State Variable filter works 1:22 My settings for two Single patches 1:58 My setings for the Multi patch 3:12 So you want to sweep the filter cutoff, too....dont you? Some modern synthesizers allow you to do this within one patch, but they MUST have TWO configurable filters PER PATCH. Waldorf Blofel...