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Normally, formant synthesis requires at least three formant filters per sound with appropriate CVs for each. The RS360 provides all of this in a single 24 HP module. However, the RS360 is more than just a formant filter. All three filters produce the four common filter characteristics: low-pass, high-pass, notch and band-pass, with summed outputs that offer the low-pass outputs of all three filters, the high-pass outputs of all three, and so on.
You can also use the RS360 as an effects unit. If you route different outputs (say, band-pass and notch) to two panned channels, you can produce stereo effects reminiscent of the flangers and phasers used in early multi-keyboards. Furthermore, you can use the self-oscillating filters as multiple audio signal sources, or create unusual waveforms from the three partials.