The Cwejman S1 - An analogue synthesizer whose high performance and flexibility give musicians unlimited opportunities to create everything from classic "vintage sounds" to sounds so unique you've never heard them before.

Extended information

The Cwejman S1 is an instrument for the true musician that gives you complete freedom to shape the sound you want. The Cwejman S1 is patchable for tremendous flexibility. It has an open interface, so everything is immediately accessible - not hidden in
submenus. We deliver it configured and ready to use, but you are completely free to patch and change the configuration until it sounds just the way you want.

The Cwejman S-1 is a semi-modular synthesizer featuring a unique sound circuit solution. In other words, this is no mere copy from the synthesizers of the 60s or 70s.

Semi-modular synthesizers
Semi-modular means that all functions and modules (oscillators, generators, filters, etc.) are linked. The synthesizer is preconfigured, but the configuration can be changed at will. All signals can be used as sounds or modulation sources and all parameters: pitch, pulse width, volume, and resonance, etc., can be modulated from any source. You can imagine the creative opportunities waiting for you inside this instrument!

Warm and powerful sound
The most unique feature of the product is the sound processing circuits that produce the unmistakable Cwejman Sound: a warm, fat, and genuine analogue sound.

Sound quality is consistent and powerful, especially in the bass register. The Cwejman S1 has a distinct sound and packs enormous possibility in a compact package.

Our sound circuits are uniquely designed using our proprietary solution. They are characterized by the same punch, bottom and consistent sound found in the vintage treasures - but they can also sound completely different.

Technical specifications

FRONT PANEL
1 master controller
1 LFO
1 mixer
3 oscillators
2 filters
1 ring modulator
1 noise generator
2 ADSR generators
1 output amplifier

MODULES Master Controller
Oscillators
Oscillators CV
DC-Coupled Mixer
DC-Coupled Ring Modulator
Noise Generator
LFO
Audio Mixer for Lowpass Filter and Multi-Mode Filter
Lowpass Filter
Multi-Mode Filter
Envelope Generators
Master Amplifier
Rear Panel
Master Controller >>top
MODULATION LEVEL Master modulation level
GLIDE 1 millisecond to 10 seconds
TRANSPOSE -2' to +2' in one octave steps
FINE TUNE ±3 semitones
LPF CUTOFF MASTER CV TRACKING Lowpass Filter frequency corner turning; amount of master control voltage, 0 to 2 Volt/octave.
LPF, CUTOFF MODULATION Lowpass Filter frequency corner modulation source selector; CV3-off-CV4, 5-octave range.
MMF CUTOFF MASTER CV TRACKING Multi-Mode Filter frequency corner tuning; amount of master control voltage, 0 to 1 Volt/octave.
MMF, CUTOFF MODULATION Multi-Mode Filter frequency corner modulation source selector; CV3-off-CV4, 5 octave range.
FREQUENCY MODULATION
Modulation inputs for Oscillator and Master Controller
OSCILLATOR 1 Pre-patched to LFO, 1 Volt/octave.
OSCILLATOR 2 Pre-patched to Oscillator 1 output 1, 1 Volt/octave.
OSCILLATOR 3 Pre-patched to Oscillator 2 output 1, 1 Volt/octave.
MASTER CONTROLLER Pre-patched to LFO, 1 Volt/octave.
MIDI/GATES & TRIGGERS Envelope Generators gates and triggers; pre-patched inputs (1V threshold) to MIDI/Gate and Trigger outputs.
Note; Envelope Generator 1 gate is always connected to selected midi channel gate output
TRIGG 1-OFF -2
Envelope Generator 1 trigger selector
1 = selected midi channel
off = no trigger
2 = selected midi channel + 1
GATE 1 - 2
Envelope Generator 2 gate selector
1 = selected midi channel
2 = selected midi channel + 1
TRIGG 1 - OFF - 2
Envelope Generator 2 trigger selector
1 = selected midi channel
off = no trigger
2 = selected midi channel + 1
MIDI/CV OUTPUTS CV1 (main tune control), 0 to 10 Volts (10 octaves)
CV2 (Velocity control), 0 to 5 Volts
CV3 (Modulation Wheel control), 0 to 5 Volts
CV4 (After Touch control), 0 to 5 Volts
Oscillators >>top
OSCILLATOR 1
RANGE
audio mode 0 (C2) to 7 (C9) in 1 octave steps
RANGE
LFO mode 6 seconds to 50 milliseconds
TUNE ±6 semitones.
PULSE WIDTH 5% to 95%
WAVEFORMS Sinus, Triangle, Sawtooth, Triangle + Pulse, Pulse, ±5 Volts.
OSCILLATOR 2
RANGE 0 (C2) to 7 (C9) in 1 octave steps
TUNE ±6 semitones.
PULSE WIDTH 5% to 95%
WAVEFORMS Sinus, Triangle, Sawtooth, Triangle + Pulse, Pulse, ±5 Volts.
SYNC Hard synchronized to Oscillator 1.
OSCILLATOR 3
RANGE 0 (C2) to 7 (C9) in 1 octave steps
TUNE ±6 semitones.
PULSE WIDTH 5% to 95%
WAVEFORMS Sinus, Triangle, Sawtooth, Triangle + Pulse, Pulse, ±5 Volts.
SYNC Hard synchronized to Oscillator 2.
Oscillators CV >>top
CV, LEVEL Amplitude modulation input, ±5 Volts @ 5 Volts CV
CV, PWM Pulse width modulation input, 5%/1 Volt CV
Mixer >>top
EXT INPUT 1 Pre-patched to LFO triangle output, gain = 1.
EXT INPUT 2 Pre-patched to Envelope Generator 1 output, gain = 1
S+ OUTPUT Sum of input 1 and input 2, patched to Oscillator 1, PWM input
S- OUTPUT Inverted sum of input 1 and input 2, patched to Oscillator 2, PWM input
Ring Modulator >>top
EXT INPUTS Inputs, pre-patched to Oscillator 1, Sine Waveform, and Oscillator 2 (sine)
OUTPUT Multiplier output.
LEVEL Amplitude modulation input, 0dB gain @ 5 Volts.
Noise Generator Outputs and Oscillator Outputs >>top
NOISE GENERATOR White noise, red noise, low frequency noise.
OSCILLATOR OUTPUTS OSC1, OSC2, OSC3 outputs
LFO >>top
RATE 20 seconds (0.05 Hz) to 20 milliseconds (50Hz)
WAVEFORMS S&H random, triangle, sawtooth (double rate), inverted sawtooth (double rate), square, all waveforms ±5 Volts
FM Frequency modulation input, 1 Volt/octave.
LEVEL Amplitude modulation input, 0dB gain @ 5 Volts CV
EXT GATE Synchronization to external signal (1V treshold) or "Gate1/Gate2"
Lowpass Filter >>top
CUTOFF Frequency corner; 16Hz to 16kHz.
Q-PEAK Flat self-oscillation
POLES Switchable 4-6 pole or 24-36dB/octave
CM; CUTOFF MODULATION Envelope Generator 1: 0 to ±1 octaves
Envelope Generator 2: 0 to ±10 octaves
Oscillator 1 (triangle)/LFO: ±5 octaves
AUDIO, EXTERNAL INPUT High Z (4 Mohm input impedance),
1 Volt input for gain = 0dB
AUDIO, OUTPUT Filter output
CV, CUTOFF Cutoff modulation input, 1 Vot/octave,
pre-patched to Oscillator 1 (triangle)/LFO.
CV, LEVEL Amplitude modulation input, 0 dB gain @ 5 Volts CV
CV, Q-PEAK Resonance, flat to self-oscillation @ 4 to 5 Volts CV.
Multi-Mode Filter >>top
CUTOFF Frequency corner; 16Hz to 16kHz.
Q-PEAK Flat self-oscillation
POLES Switchable 2/4/6 pole @ lowpass mode and 1/2/3 pole @ highpass mode, 3 poles @ bandpass (active @ 6 pole mode)
CM; CUTOFF MODULATION Envelope Generator 1: 0 to ±1 octaves
Envelope Generator 2: 0 to ±10 octaves
Oscillator 1 (triangle)/LFO: ±5 octaves
AUDIO, EXTERNAL INPUT High Z (4 Mohm input impedance),
1 Volt input for gain = 0dB
AUDIO, OUTPUT Filter output
CV, CUTOFF Cutoff modulation input, 1 Vot/octave,
pre-patched to Oscillator 1 (triangle)/LFO.
CV, LEVEL Amplitude modulation input, 0 dB gain @ 5 Volts CV
CV, Q-PEAK Resonance, flat to self-oscillation @ 4 to 5 Volts CV.
Envelope Generators >>top
ATTACK TIME 0.5 milliseconds to 20 seconds
DECAY TIME 0.5 milliseconds to 20 seconds
SUSTAIN LEVEL 0 to 5 Volts.
RELEASE TIME 0.5 milliseconds to 20 seconds
DELAY TIME 1 millisecond to 10 seconds
CV, ATTACK 0.5 milliseconds to 20 seconds @ 0 to 5 Volts CV
CV, DECAY 0.5 milliseconds to 20 seconds @ 0 to 5 Volts CV
CV, SUSTAIN 0 to 5 Volts @ 0 to 5 Volts CV
CV, RELEASE 1 millisecond to 10 seconds @ 0 to 5 Volts CV
CV, LEVEL Amplitude modulation, 5 Volts peak @ 5 Volts CV.
OUTPUTS Positive going, 0 to +5 Volts.
Negative going, 0 to -5 Volts
Master Amplifier >>top
AUDIO, FILTER MIX Panning mixer for Lowpass Filter and Multi-Mode Filter audio output.
AUDIO, OVERDRIVE Overdrive control from clean to full saturated audio signal output.
AUDIO, EXT INPUT Audio input, pre-patched to Lowpass Filter output
AUDIO, OUTPUT Instruments audio output.
AM, ENVELOPE MIX Amplitude modulation; Envelope1 and Envelope2 panning mixer.
AM, ENVELOPE MODE Linear mode, gain 0dB @ 5 Volts CV, 20%/Volt.
Log mode, gain 0dB @ 5 Volts CV, 15dB/Volts.
AM, EXT VELOCITY Velocity control, pre-patched to CV2
REAR PANEL >>top
MIDI INTERFACE MIDI IN (and programming), MIDI OUT (program verification) and MIDI THRU
MIDI OUTPUTS
CV1 Fixed: main tune, 0 to 10 Volts (10 octaves)
CV2 Factory preset: Note on Velocity, 0 to 5 Volts
CV3 Factory preset: Control Change #05, Modulation Wheel, 0 ±5 Volts
CV4 Factory preset: Channel After Tounch, 0 to 5 Volts
MASTER CV + Glide & Pitch Bend Control
GATE1 +15 Volts active
TRIGG1 +15 Volts active
GATE2 +15 Volts active
TRIGG2 +15 Volts active
STRIG inverted gate, short circuit active
MIDI CHANNEL MIDI channel selector
ANALOG INPUTS
CV main tune, 1 Volt/octave
GATE envelope generator gate, 1 Volt treshold
TRIGG envelope generator trigger, 1 Volt treshold
STRIG inverted gate, short circuit active
CALIBRATION OSC1, OSC2, OSC3, OSC4; for sensitivity 1 Volt/octave
OSC1, OSC2, OSC3, OSC4; 'RANGE' selectors octave calibration
MASTER, SCALE; general scale sensitivity calibration
MASTER, ANALOG CV INPUT; analog control voltage calibration, 1 Volt/octave, 5% range.
MAINS INLET Power cord inlet
115/230V SELECTOR Switch fot mains voltage selection
INSTRUMENT OUTPUTS BALANCED, 16 dBV max @ 600 ohm (rear panel)
SINGLE ENDED, 10 dBVmax (front and rear panel)