Cherry Audio Crumar DS-2 [WiN]

• Product: Crumar DS-2
• Publisher: Cherry Audio
• Version: 1.0.3.38
• Format: Standalone, VST, VST3, AAX
• Requirements: Windows 7 or later
• Source: cherryaudio.com/products/ds-2-synthesizer

Cherry Audio Crumar DS-2 is a hybrid virtual synthesizer that recreates a vintage DCO-based instrument combining monophonic synthesis and polyphonic string generation. It features stepped waveform oscillators, dual-engine layering, expanded polyphony, and a deep modulation system with multiple LFOs and routing options. Modern enhancements include integrated multi-layer effects chains, flexible voice modes, and advanced control over modulation behavior. The plugin focuses on preserving the original instrument’s raw and irregular character while extending it into a more powerful and flexible sound design tool for contemporary production.

Key Takeaway

Cherry Audio Crumar DS-2 delivers a hybrid synthesis system that preserves stepped DCO character while expanding it into a modern, modulation-heavy, multi-engine instrument.

Crumar DS-2 — a hybrid DCO-based synthesizer emulation that combines mono synthesis and polyphonic string generation with expanded modulation and modern workflow control

Vintage hybrid synthesizers often sit in an awkward space between analog warmth and early digital control, producing textures that feel raw, unstable, and difficult to replicate accurately. While many modern emulations aim for polish and usability, they frequently smooth out the quirks that defined these instruments in the first place. The challenge is not recreating the architecture—it is preserving the uneven, stepped, and sometimes abrasive behavior that gives these synths their identity while making them usable in modern production.

Crumar DS-2 is a virtual instrument that recreates the original late-70s Italian hybrid synthesizer, combining a monophonic synth engine with a polyphonic string section while extending both with modern voice architecture, modulation depth, and integrated effects.

The instrument is built around digitally controlled oscillators (DCOs) paired with an analog-style signal path, producing stepped waveforms and harmonically irregular textures rather than smooth analog tones. Unlike traditional subtractive synths, it operates as a dual-engine system, where a lead/bass-focused mono section and a chord-oriented poly section can be layered or split across the keyboard.

This positions it as a hybrid texture synthesizer, not a clean analog emulation.

Where Traditional Analog Emulations Lose Character

Most virtual analog synths aim for consistency—stable oscillators, smooth filters, predictable modulation. However, early DCO-based instruments like the original DS-2 introduced artifacts such as stepped waveforms, uneven modulation, and slightly rigid oscillator behavior.

These characteristics are often treated as flaws and removed in modern designs. The result is a cleaner sound, but one that lacks the raw, slightly unstable identity that made these instruments distinctive.

The DS-2 recreation retains this behavior while expanding control. Instead of smoothing the signal, it preserves the stepped harmonic structure and combines it with deeper modulation and polyphony, allowing those imperfections to be shaped rather than eliminated.

Dual Engine Structure and Layered Voice Architecture

The defining structural feature is the combination of two independent sound engines. The synth section handles monophonic or multi-voice operation, while the poly section generates string-like textures with extended polyphony.

Modern enhancements significantly expand this architecture. The synth engine now supports polyphonic modes (4, 8, or 16 voices), unison stacking, and voice cycling, while the poly section can reach up to 32 voices for dense chord layers.

Layer and split modes allow both engines to operate simultaneously across different keyboard ranges or stacked together. This creates a structure where bass, lead, and pad elements can be generated inside a single patch rather than distributed across multiple instances.

The result is a multi-role instrument, capable of both focused mono synthesis and wide polyphonic textures.

DCO Oscillators and Stepped Waveform Behavior

The oscillator design is based on digitally controlled oscillators, which provide tuning stability but introduce a distinct tonal character compared to voltage-controlled systems.

In this implementation, the oscillators produce stepped waveform shapes, resulting in harmonic content that feels more granular and less fluid than traditional analog waveforms.

This creates a tonal profile that sits between analog and digital—stable in pitch, but texturally irregular. When combined with modulation, these waveforms produce movement that feels mechanical rather than organic, which becomes a defining part of the instrument’s identity.

Instead of aiming for warmth alone, the oscillator behavior emphasizes character and edge.

Expanded Modulation System and LFO Routing Depth

One of the most significant modern extensions is the modulation system. The original architecture already included strong LFO capabilities, but the plugin expands this with a third LFO, additional waveform types, and deeper routing flexibility.

Each LFO includes independent delay, sync, retrigger, and one-shot behavior, along with reverse waveform options. A central LFO mixer allows multiple modulation sources to be routed across dozens of destinations, effectively turning the instrument into a modulation-heavy environment.

Envelope behavior is also extended with looping functionality, enabling cyclic modulation patterns that blur the line between envelopes and LFOs.

This transforms the instrument from a static vintage emulation into a dynamic modulation system, capable of evolving textures and rhythmic movement.

Filter Modes, Effects Chains, and Internal Sound Processing

The filter section includes both 12dB and 24dB modes, allowing different slopes and tonal responses depending on the application. Key tracking and polarity controls extend its responsiveness across the keyboard.

Beyond the core synthesis engine, the plugin integrates three independent effects chains—one for each engine plus a global layer. These chains include a suite of 20 studio-quality effects that can be arranged and modulated internally.

This turns the instrument into a self-contained sound design environment. Instead of relying on external processing, patches can be fully constructed—including spatial and tonal shaping—within the plugin itself.

The result is a workflow where synthesis and processing are tightly integrated.

A Character-Focused Hybrid Synth Built Around Imperfection and Layering

The DS-2 stands out by leaning into its irregularities rather than correcting them. The combination of stepped oscillators, dual-engine architecture, and expanded modulation creates a sound that is less polished but more distinctive than typical virtual analog instruments.

Its strength lies in layered textures—combining mono-driven presence with wide polyphonic content inside a single patch. The added modulation depth and effects chains extend its usefulness beyond emulation into broader sound design territory.

This is not a general-purpose synth designed for clean, predictable tones. It is a character instrument, built for producers who want movement, density, and tonal irregularity as part of the sound

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