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Thanks to an original mixture of FM, AM, additive and substractive synthesis, Rainbow is able to produce a wide assortment of sounds, from analog emulations or synthesized drums to 80’s electric pianos or synth basses. Each voice features up to 4 oscillators, with a variety of classic waveforms (Sine, Saw, Square, Triangle, Noise). These waveforms can be modified in a number of ways, including variable distortion waveshaper and rectification. Oscillators routing is fully dynamic, with sliders controlling the FM amount and mix output. This makes it possible to define your own FM algorithms, including crazy feedback combinations not found in typical FM implementations.
Finally, The mix from the four oscillators is processed by a warm multimode resonant filter (HP, LP or BP, with -12 dB/oct or -24 dB/oct slopes). A stereo chorus effect provides the finishing touch.
In addition to this classic FM/substractive architecture, Rainbow provides a few innovations that set it apart from other synths: oscillators can amplitude-modulate each other for unusual ringing textures. The onboard step sequencer can be used to generate hypnotic patterns and unique effects. Microtonal support is also available.
If you need classic sounds (like powerful analog basses or shimerring FM pads) with an unusual edge, Rainbow may be just what you need. There are many preset banks available for download, that demonstrate the power and originality of this unique synthesizer.
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