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Schippmann Music CS-8 Omega-Phi II VCO

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989,00 € 21% IVA inc
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Omega-Phi  II - Thru-Zero FM/Thru-Zero Phase Modulation Dual VCO

The worlds first analogue voltage controlled oscillator with true Phase-Modulation!!
Version II improved version of the high performance Thru-Zero Oscillator OMEGA-PHI :

- A parasitic noise effect especially audible at low oscillator frequencies at the Omega-sine/tri outputs exactly when the thru-zero operation begins to start by FM-modulation through a sine modulator is

reduced by 15 db and is so no longer audible! BTW: a similar noise at the Phi-sine/tri outputs was not reduced!

- Highly improved oscillator FM-stability by a.) a new precision rectifier design leading to terrific in-tune FM synthesis over the full index over a very wide frequency range.

b.) a new core-symmetry circuit for a perfect balanced triangle wave eliminates tendencies to asymmetric tri/sine shapes even at high FM-modulation frequency/carrier frequency ratios. This leads to no more carrier-sine distortions and no detunes even at high ratios.

c.) improved thermal board design for better frequency stability and linearity at very high frequencies and thus more stable FM results, generally.

Extended maximum FM index from 44 to now 50.

Secondly, the VCO environment:
- Completely new VCA design for FM and PM providing ultra low noise and ultra low control feed-through capability

- Ultra low constant or transient frequency shifts with varying FM indices in both modes, DC and AC.

- Cleaner sound, especially for PM and also for FM at higher oscillator frequencies, where VCA noises become relevant.

- Smoother VCA-index curve for better control even around zero (starting of modulation, see graphic)

The high performance VCO Omega-Phi II of the CS-8 series is a so-called thru zero oscillat or t o t he power of 2. Oscillat ors of this type are able to process negative control voltages resulting in a reversal of their curve. With that technical difference, for thru zero oscillators are arising very significant properties. In comparison to ordinary oscillators the harmonic relationships will kept constant independently of the modulation depth (index), wherefore true Fm synthesis is possible with this type of oscillators (provided that they bring the required technical qualities with it). The ultimate feature of the Omega-Phi, moreover, is the capability of an additional true phase-modulation section. It is connected downstream to the oscillator core and the sound is very similar to the sound aesthetic of the frequency modulation. The downstream architecture provides lots and mighty possibilities of sound synthesis. E.g. it is possible to create PM sounds (Phi section) and having at the same time clean standard waves at the core outputs (Omega sect ion) for ot her kinds of synt hesis. Also modulat ion cascades are possible, where a first modulat or creat es FM synt hesis and a second one a phase modulation of the FM result. 

Moreover, there exists a number of synchronization possibilities, interesting intermediate states (between "Thru zero" and "normal"), for each of the both sections (Omega & Phi) a by one oct ave decimat ed sub frequency wave and apart from PWM a mighty saw-tooth wave-shaping with 1-2 octaves-up effect and an absolute super round sine-wave. 

Schippmann Music CS-8 Omega-Phi II VCO


· 3U, 24 HP

Fabricante Schippmann Music
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