Crumar DS-2 Synthesizer

Cherry Audio's Crumar DS-2 synthesizer is a virtual instrument plugin that faithfully recreates the distinctive sonic capabilities of the original 1978 hardware synth. This latest collaboration with Crumar Instruments not only captures the unique tone and multitimbral experience of the original but also enhances it, providing a remarkable blend of innovation and authenticity.

The original Crumar DS-2 featured a monophonic synth engine paired with a 44-note fully polyphonic (paraphonic) companion section, creating a unique musical experience when utilized together. "DS" stood for "Digital Synthesizer," and it was indeed an early hybrid synth with two Digitally-Controlled Oscillators (DCOs), and analog LFOs, VCFs, VCA, and EGs. But these weren't the same kind of DCOs we would become familiar with in later polyphonic synthesizers. To avoid the tuning problems of traditional analog synthesizers, Crumar employed a cutting-edge concept in the Synth section to create oscillators that wouldn't drift. The resulting waveforms, however, were completely stair-stepped, producing a gritty tone and wild harmonics.

The Poly section was paraphonic, with a single filter (with highpass and lowpass knobs) and its own VCA. It generated unique 'sawtooth' waveforms by combining divide-down square waves with resistors and high-pass filtering. The cutoff, resonance, and modulation settings of the Synth section also applied to the paraphonic poly filter.

As a result, the timbres produced by the DS-2 are distinct from both the smooth, polished sounds of most digital synthesizers and the warm, buttery tones associated with classic analog designs. Instead, the DS-2 has a jagged, harmonically edgy quality that sets it apart. Its sound possesses a gritty character with a slightly stepped texture, resulting in a rawness with a rasping quality and a certain bite.

DS-2 is a true example of "vintage digital" technology, and it's been an exciting journey to revive it in collaboration with Crumar Instruments.

In typical Cherry Audio fashion, we have enhanced the DS-2 with a variety of new features:

• Synth section: monophonic mode with last/high settings, Unison, and Multi voice options (including voice cycling, panning, and tuning). Polyphonic capabilities with 4, 8, or 16 voice options.
• Poly section: now fully polyphonic, accommodating up to 32 notes.
• In addition to the layered mode, there is a keyboard split mode for the Synth and Poly tone generators, featuring adjustable ranges for both splits and layers.
• OSC 2 in the Synth section now includes a stair-stepped Sine waveform option.
• Oscillator sync added.
• A third LFO is provided, offering Ramp, Sine, Square, and Staircase waveforms.
• LFOs have been enhanced with discrete delay knobs for each, replacing the previous global delay knob.
• LFOs now include sync, retrigger, and one-shot capabilities, along with reverse wave options for LFOs 1 and 2.
• The LFO Mixer, which was hardwired to OSC 1, OSC 2, VCF, VCA, and Pulse Width in the original, now features six assignable destinations with 33 options each.
• An initial delay stage and velocity have been added to the envelopes.
• Looped envelopes are now available.
• VCA release control is included for the Poly section.
• Touch control offers four slots with a simple click-to-assign functionality, allowing control by channel or polyphonic aftertouch with compatible controllers.
• The VCF now provides both 12dB 2-pole and original 24dB 4-pole options, with polarity and key follow.
• Assignable bend range.
• Mod wheel.
• Dynamic arpeggiator for either or both sections, with four pattern modes – Arp, Leap, Order, Random – with Swing, Chance, and Feel to add degrees of randomness to arpeggiated patterns.
• Three independent customizable effects chains, one each for the Synth and Poly sections, plus a global layer, with an individual effects modulator for each layer.
• 20 studio-quality effects that can be arranged, saved, and recalled within their effects chains, which are interchangeable with recent Cherry Audio synthesizers:
  • BBD Flanger, Compressor, Digital Delay, Digital Reverb, Distortion & EQ, Dual Delay, Dual Ensemble, Dual Phaser, Envelope Filter, Flanger & Chorus, Galactic Reverb, Lo-Fi, Lushverb, Ring Modulator, Seven Band EQ, Spring Reverb, Tape Echo, DCO Chorus, Panner, and Pulser.
• Mini quick-access effects strip for on/off, solo, bipolar modulator amount slider, and dry/wet mix for each effect. Global FX on/off, level, and stereo expand.
• Over 300 professionally designed presets in 14 categories.
• Complete MIDI control and DAW automation for all controls, with easy-to-use MIDI learn and mapping (Preset and Global).