So, this patch has one problem, while I followed the steps as best as possible, there does not seem to be a note off trigger. I went looking through his other work and downloads for the subpatch he uses and did not find it. Oh well. This patch works by generating a monophonic waveform that is then fed through a band pass filter. This filter is attached to a modulation engine that effects the cutoff frequency and the rate at which that cutoff filter is opening and closing. In doing this, we are able to cut out certain frequencies and then bring them back in rapidly. This results in the low “wubbing” sound created by the patch.