Each preset or user program in Program Mode can simultaneously work on a different MIDI channel (1-16). K2661 is a 16 channel multi-timbral synthesizer with a sophisticated "invisible" multi mode. There are 4 organ maps available with rotary speaker emulation, vibrato/chorus, percussion, key click, parametric EQ, etc. Each single voice contains nine harmonics that may be blended in real time using the sliders. It provides a powerful tone-wheel organ synth model, fully polyphonic over the keyboard. "Everything can be modulated by everything" (you can use functions for modulation source control as mixers, negators, invertors, sample and hold, quantization, ramp, shape, etc.).Įach sound program can consists of up to 32 layers. pitch, filter, amplitude, pan, or direct control of LFO waveforms).
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There are 3 very fast envelope generators (AMPENV - amplitude envelope / ENV2, ENV3 user definable - 8 segments, looping), ENCTL (envelope control) for dynamic or continuous ADR parameters control, 2 LFOs (generators with many cyclic waveforms and adjustable phase angle between 0 – 270 degrees), 2 ASR envelopes for start and attack of user definable modulation functions, FUN (mathematical functions - formulas full of sin, cos, tg etc., for modulation of individual parameters of DSP algorithms e.g. stimulator, digital wrap, noise generator, PWM, X-Fade, amplitude modulation, panner, etc.Īll individual parameters are fully editable (Hz, cent, dB, sec, msec settings, which offers significant advantages over the usual 1-127 convention). Other DSPs available are shaper, high freq. Internal or external samples can be filtered (HPF, LPF, 12db/oct, 24db/oct, BPF, notch, peak, all pass, steep resonance), equalized (several EQ types), mixed with digital oscillators (digitally generated waveforms like sine, sine+, LF sine, saw, saw+, LF saw, square, square+, LF square), distorted and cross modulated. This feature makes it really unique among other sample-based instruments. K2661 can thus emulate several types of synthesis.
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The algorithms are not rigidly defined as is the case with the Roland JD/JV and XV series but the types of DSP units in an algorithm can be changed. Unfortunately, triple Layer uses the same polyphony as a normal three-layer Program.Īs mentioned above, algorithms have variable segments, or in other words, individual DSP units. You can even combine a Triple Layer with normal Layers. The algorithms for Layer 2 include a block that combines the output of Layer 1 with the sample assigned to Layer 2, and the algorithms in Layer 3 further process output of Layer 2. This feature is called Triple Mode Processing There are 30 new algorithms available for Layer 1, 38 for Layer 2 and 26 for Layer 3 of Triple Layer.
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Algorithms can be combined in groups of three Layers connected in a serial manner. The new synthesizer processing engine expands the number of DSPs from 31 (on previous K2500) to 127. PCM samples or digital oscillators (digitally generated waveforms like sine, sine+,LF sine, saw, saw+, LF saw, square, square+, LF square) can work together within any one of the total of 127 DSP algorithms. Some of the above mentioned functions can be used with internal ROM samples as well. The external RAM sample can be fully edited using the following functions Sample Start, Attack, End, Cut/Copy/Paste loop forward, backward, bi-directional looping and loop bypass truncate, fade in, fade out, reverse, cross-fade looping with selectable curves and many other.
Without SMP-61 installed, K2661 works as a fully functioning sample player. With optional SMP-61 advanced sampling expansion boards, which add analog and digital sample inputs, K2661 works as a full sampler. There are 32 MB of onboard ROM (including the previously optional 4 MB Stereo Grand Piano, 8 MB Orchestral, 8 MB Contemporary and 8 MB General MIDI boards) + 2 optional sample ROM boards - 8 MB Stereo Dynamic Piano and 8 MB Vintage Electric Piano) + max of 128 MB sample RAM. It is a unique system of pre-defined algorithms with a number of variables, individually editable DSP functions and digital oscillators, combined with the internal or external PCM samples. The synthesis, this instrument uses, is called V.A.S.T., which stands for Variable Architecture Synthesis Technology. It is the upgraded version of the famous K2000/2500 synthesizers with a completely redesigned circuit board and with the incredibly powerful Triple Modular Processing. Kurzweil K2661 is a DSP based, 127 algorithm, 48-voice polyphonic synthesizer/sampler workstation.
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