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By  Cherry Audio LLC

Mercury-4 faithfully recreates the Jupiter-4’s analog oscillators and iconic stereo chorus “ensemble” circuit while introducing modern enhancements like a Space Echo-style tape echo with multiple reverb modes. With up to 16-voice polyphony, over 300 curated presets, and comprehensive MIDI control, Mercury-4 offers vintage charm and contemporary functionality.

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Product Price

$59.00 $54.87

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Introduction to Mercury-4 by Cherry Audio

Originally released in 1978, the Roland Jupiter-4 synthesizer pioneered the combination of voice-assign polyphony with digital patch storage, a groundbreaking feature enabling users to store and recall sounds instantly. Voice-assign polyphony, allocating notes to synthesizer voices based on keyboard input, revolutionized polyphonic synthesis, especially during an era dominated by rudimentary string synthesizers and limited patch recall options.

Despite its overshadowing by larger and more complex instruments, the Jupiter-4’s sonic prowess remains unparalleled. Its analog oscillators produce a raw, aggressive tone, enhanced by a built-in sub oscillator for added depth. Unique LFO modulation capabilities and Roland’s iconic stereo chorus “ensemble” circuit further contribute to its distinct sonic character.

However, the original Jupiter-4 had its limitations, including a sparse eight user patch locations, limited polyphony, and susceptibility to tuning issues. Cherry Audio’s Mercury-4 addresses these shortcomings with enhanced features such as expanded polyphony, infinite patch storage, and intuitive patch editing.

Mercury-4 faithfully recreates the Jupiter-4’s oscillator and filter tonality while incorporating modern enhancements such as a Space Echo-style tape echo with multiple reverb modes. Key features include up to 16-voice polyphony, over 300 presets curated by industry experts, tempo-synced arpeggiator, and comprehensive MIDI control.

With its meticulously modeled components and innovative features, Mercury-4 offers a seamless blend of vintage charm and modern functionality, available in various formats including AU, VST, VST3, AAX, and standalone. Experience the power and versatility of Mercury-4 with a free 30-day demo.


  • Authentically modeled oscillator with sub oscillator
  • All filter characteristics modeled, including powerful low-frequency resonance
  • Up to 16-voice polyphony
  • Over 400 presets, programmed by industry veterans
  • Exactingly replicated unique arpeggio section w/tempo sync
  • Carefully modeled wide-range LFO modulation with “inverted” mod characteristics
  • Drift control for increased analog realism
  • Precisely replicated stereo ensemble effect
  • Warm and organic tape echo with multiple reverb modes
  • Tempo-syncable LFO
  • Detunable unison mode
  • Single-key chord memory mode
  • Highly optimized coding for high performance with ultra-low CPU load
  • User-adjustable oversampling control
  • Advanced one-click UI magnification
  • Comprehensive MPE support
  • Full MIDI control and DAW automation for all controls



  • Windows 7 or above (Including Windows 11)
  • 64-Bit System
  • Quad Core Computer with 8GB of RAM recommended.


  • MacOS 10.13 or above
  • MacOS 13 Ventura supported
  • 64-bit required
  • Native Apple M1 or greater processor support, including Ultra.
  • 3.4 GHz Quad-Core or M1 CPU with 8GB of RAM recommended.

Digital license code delivery: You will get your unique serial number via email in seconds after the purchase is complete.

No Returns on Software. Once your software is activated it is not eligible for returns.


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