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In page Evolver (synthesizer):

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The effects available in the Evolver include distortion, delay, hack, feedback, and grunge. The distortion is digital, and at the value of 1, the distortion acts as a noise gate. There is a 3-tap delay, meaning that the signal can be delayed with three flexibly programmable delays that are independent from each other. The hack effect "trashes" the output (it can also be applied to external audio before the low pass filter), it produces an effect similar to bit reduction or decimation. There is also an option to create independent stereo feedback loops, which is routed through the filter. The grunge option produces a nasty feedback at higher levels, but has no effect at lower levels.