Big Little Brother

Initially designed as a "kid brother" to the JUPITER-4, the deceptively small PROMARS married the stability and flexibility of microprocessor control with the rich sound of analog, and was one of the first synths with onboard memory. This powerful monophonic instrument boasted fat buzzy leads and a powerful low end, proving big things often come in little packages.

Otherworldly Tones

While the JUPITER-4 featured one VCO and one sub-oscillator per voice, PROMARS had two of each. Users could detune them to produce a distinctive unison chorus effect, producing sounds like a four-VCO synthesizer. It sounded positively huge, making it a go-to synth for fat, growling basses and searing lead tones.

Plug In Your Own PROMARS

Our software version of PROMARS perfectly recreates the sound of this rare, vintage instrument using original design specs and a detailed, part-by-part analysis of each analog circuit. But it also features some new capabilities only found in the plug-in:

Each oscillator has extended range for more flexibility

The LFO includes a new Random waveform setting

Full user control of noise and pulse width

Advanced arpeggiator with tempo sync

Modern effects: reverb, bit-crusher, and tempo-syncing delay

Hardware Integration

PROMARS is also a PLUG-OUT synthesizer that can be hosted in Roland’s SYSTEM-8, SYSTEM-1, and SYSTEM-1m hardware synthesizers. This means you can work in your computer-based DAW or perform live without a computer using the exact same sounds. You can even send sounds back and forth between the hardware and software, and use the hardware as a hands-on controller.