However, the Polymoog had a number of frustrating limitations. The original model came with eight hardwired presets and one "variable" mode in which the front panel controls determined the sound. A big problem was with filtering; only in the preset mode did each voice have its own filter. When the variable mode was engaged, the synth became paraphonic in that there was only a single VCF for the whole synth. When playing a chord, the VCF would track the highest note played, leaving lower notes almost unfiltered. Also, although the synth had two VCOs per voice, the VCOs were actually based on a divide-down architecture. As it always does, this produced thin, "weedy" sounds when playing chords, and it was difficult to get either a lush or an aggressive sound. The cramped panel controls also c