Cwejman SM-1

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€2,020.00 *
Net price: €1,697.48

Prices incl. VAT plus shipping costs

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The Cwejman SM-1 is a semi modular synthesizer voice that can be played instantly via CV/ Gate.... more
Product information "Cwejman SM-1"

The SM-1 is a luxurious synthesizer voice, consisting of two oscillators, a multi-mode filter, VCA and two ADSR loop envelopes as well as two LFOs.

We currently do not accept pre-orders for Cwejman products. If you are interested in this module, please use the availability notification. The number of Cwejman circuits is limited. Therefore, we recommend you to order online IMMEDIATELY when a module becomes available. Enquiries via e-mail or telephone are usually not fast enough. (More detailed information can be found on the product page.)

The Cwejman SM-1 is a semi modular synthesizer voice that can be played instantly via CV/ Gate.

The module contains two oscillators, a multimode filter, VCA and two ADSR loop envelopes and LFOs. All sections can also be used individually thanks to many patch points.

The master section offers an octave switch with a total of 7 positions. Tracking can be activated separately for each oscillator and for the LFO1 via small switches. In addition, voltage can be smoothed thanks to the glide control. The tracking for the filter cutoff frequency can be variably adjusted thanks to a potentiometer.  
The two LFOs each offer seven different waveforms, including a random voltage. The speed is adjusted manually with rotary knobs or via control votlage and indicated by LEDs.

The two oscillators have an identical layout, with individual controls for volume and FM. The Sync switch allows the second VCO to synchronize with the first. The pitch can be adjusted with potentiometers for coarse and fine tuning. Six waveforms are available, including pulse width and PMW modulation. VCO1 also provides noise, and VCO2 can be used as a ring modulator when the waveform selector is set to a specific position, either with the first oscillator or with the external signal. Each VCO provides two FM inputs with dedicated attenuators, and the FM1 modulation can be positive or negative thanks to the switch.  

The Multimode Filter is a slimmed down version of the MMF-1S with seven reversible filter types and two selectable slopes for most of them. Combined, this results in eleven different filters:

  • Low pass with -12 or -24 dB per octave
  • High pass with -12 or -24 dB per octave
  • Bandpass with -6 or -12 dB per octave
  • three dual bandpasses: two peaks, upper peak, lower peak
  • single notch (in -12 dB position), dual notch (in -24 dB position)

The Res/Osc switch determines whether the resonance begins to oscillate at maximum or not, allowing for a wide range of sounds.
The show stopper is that with the dual filters the distance between the two resonance peaks can be adjusted via the SPACING parameter, which is great for creating vocal sounds! A total of three knobs are available to influence the filter cutoff frequency. Thanks to separate controls, it can be controlled from envelope 1 or 2, either in the positive or negative range. Additionally it can be controlled by VCO1, LFO1, LFO2 or an external control voltage. Thus, very complex modulation can be realized in no time at all.
In addition, the filter offers a saturation stage with two selectable types, which distorts the signal nonlinearly.

There are two identical envelope generators available which can be triggered by a normalized socket from a common signal. Two LEDs indicate the course of each envelope. All parameters (Attack, Decay, Sustain and Release) are voltage controllable. Both envelopes can be switched to Loop mode using individual switches. In addition, the characteristics of the second envelope can be switched from linear to exponential.

External videos:

HE: 3
TE: 56
Depth: 29
Power consumption +12V: 150
Power consumption -12V: 120
Related links to "Cwejman SM-1"
"Cwejman SM-1"
Cwejman Website

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