G-Storm Electro JU60-VCF: Recreating the Roland Juno-6/60 Jupiter-8 Filter Magic

In the expansive canvas of eurorack modules, the G-Storm Electro JU60-VCF stands as a fine ode to the revered Roland Jupiter-8 and Juno-6/60 filter topology. This module valiantly recreates the timeless tone and versatility of Roland's lauded filter design. It won't morph your system into a polyphonic synth, but it will unquestionably serve a delightful sprinkle of the classic vintage analog flavor.

At the core of this module lies a 4-pole low pass filter built with a vintage IR3109 chip, boasting a BA662 OTA chip in the resonance feedback loop, the same technology utilized in Roland's acclaimed Jupiter-8. With a switch for selecting 2-pole or 4-pole operation, this filter adaptation goes beyond being a mere reinterpretation of the original, providing flexibility for sound shaping experiments.

The module also features a resonance control that allows for the depth of the peak frequency resonant feedback. This feature is capable of self-oscillation, which results in the generation of a beautifully pure sine wave, offering the space for users to create harmonically rich content.

The design of the JU60-VCF also includes two inputs - IN1 & IN2, allowing you to mix together 2 different audio signals, each with their own mix pot, extending its functionality as a miniature mixer within your modular setup. These multi-faceted mix pots cater to varied audio sculpting needs, thus ensuring wide-ranging sound possibilities.

FREQUENCY and RESONANCE are two control knobs that define the filter's identity, allowing alterations to the initial cutoff frequency and the depth of the peak frequency resonant feedback, respectively. With CV1 & CV2, you get to modulate the Cutoff Frequency with any polarity of modulation source.

The MODE switch facilitates the selection between lowpass 2-pole or 4-pole operation. The final audio output is available through the OUT jack of the filter. In unison with your favored stereo chorus modules and pedals, the JU60-VCF is competent in crafting an enriched sonic palette unmatched at its price point.

This eurorack marvel perfectly captures the heart and soul of Roland's iconic filter design in a compact module, without making any compromises on the sound quality or functionality. Accessible for beginners, yet complex enough for seasoned users, the G-Storm Electro JU60-VCF broadens the sound design possibilities in eurorack synthesis. Delving into the mesmerizing world of low pass filters is now a luxury that's just one module away. Stay tuned in the Reverb store for availability and get ready to experience the magic of the JU60-VCF. There's nothing like the sweet sound of a classic recreated.

Example Usage

Novice Usage Example:

To begin exploring the G-Storm Electro JU60-VCF, let's start with adjusting the Cutoff Frequency and Resonance. Set the Frequency knob to a mid-range position, and slowly increase the Resonance knob. As you turn the Resonance knob, you will notice the peak of the filter becoming more pronounced, adding a distinct character to the sound. Play around with different settings to find the sweet spot that suits your taste.

Now, let's dive into the IN1 and IN2 inputs. Connect two different audio signals to these inputs, such as a synthesizer and a drum machine. Use the mix pots to adjust the levels of each input signal. Experiment with blending the two sounds together, creating interesting textures and sonic combinations.

To add some modulation to the filter, use the CV1 and CV2 inputs. Connect a modulation source, like an LFO or an envelope generator, to these inputs. Start by slowly increasing the modulation depth to introduce subtle variations in the Cutoff Frequency. As you explore different modulation sources, be creative and let the filter react dynamically to the incoming signals.

The MODE switch on the module allows you to choose between lowpass 2-pole and 4-pole operation. The 2-pole mode will give you a smoother and softer sound, while the 4-pole mode will provide a sharper and more resonant character. Experiment with both modes to find the one that suits your musical style and the specific sound you want to achieve.

Finally, connect the audio output jack to your mixer, audio interface, or any other audio destination. This will allow you to hear the filtered sound and further process it using effects or other modules in your Eurorack system.

Remember, the G-Storm Electro JU60-VCF is all about capturing that classic Roland Juno-6/60 and Jupiter-8 filter magic. So, unleash your creativity, combine it with your favorite stereo chorus modules or pedals, and start crafting those iconic vintage synth sounds. Enjoy exploring the sonic possibilities of this module!

One popular way to use the G-Storm Electro JU60-VCF is to pair it with a sequencer module to create rhythmic filter sweeps. Connect the CV1 input of the JU60-VCF to the CV output of the sequencer. Set the sequencer to a sequence with varied CV values, such as a random or stepped pattern. Adjust the MODE switch to select between lowpass 2-pole or 4-pole operation, depending on the desired filter character. Use the FREQUENCY and RESONANCE knobs to shape the cutoff frequency and resonance of the filter. Experiment with different audio signals patched into the IN1 and IN2 inputs of the JU60-VCF, each with their own mix pots, to create interesting sonic textures. Finally, patch the audio output of the JU60-VCF to other modules in your eurorack system or to external effects units for further processing. The combination of the rhythmic modulation from the sequencer and the classic filter sound of the JU60-VCF will add depth and movement to your patches.

Further Thoughts

In this example, we will explore how the G-Storm Electro JU60-VCF can be used creatively in a Eurorack setup to recreate the iconic filter magic of the Roland Juno-6/60 and Jupiter-8 synthesizers.

  1. Start by patching an LFO output from your modulation source into CV1 on the JU60-VCF. This will allow us to modulate the cutoff frequency of the filter over time.
  2. Next, connect the audio output of your chosen oscillator module to the IN1 jack on the JU60-VCF. This will serve as the main audio signal going through the filter.
  3. Experiment with turning the Frequency knob to set the initial cutoff frequency of the filter. Begin by starting low and gradually sweeping up to hear the filter's effect on the sound.
  4. Now, let's add a second audio source to the mix. Connect the output of another oscillator or sound module to the IN2 jack on the JU60-VCF. Adjust the Mix potentiometer for each IN jack to find the desired balance between the two audio sources.
  5. As you play your modular system, adjust the Resonance knob to control the depth of the peak frequency resonant feedback. Increase the Resonance to introduce a more pronounced and resonant sound, or decrease it for a more subtle filtering effect.
  6. To further enhance the versatility of the JU60-VCF, you can experiment with CV2 modulation. Patch another modulation source into CV2 to introduce dynamic modulation to the cutoff frequency. This will add movement and variation to your sound.
  7. Lastly, utilize the MODE switch on the JU60-VCF to select between lowpass 2-pole or 4-pole operation. The 2-pole mode will provide a different character and tonal color compared to the 4-pole mode. Experiment with both options to find the desired filter response for your sound.

With the G-Storm Electro JU60-VCF, you can achieve a classic analog filter sound reminiscent of the Roland Juno-6/60 and Jupiter-8 synthesizers. Its resonance capabilities, mixed audio inputs, and modulation options make it a versatile tool for sound shaping and experimentation in your Eurorack system. Don't forget to pair it with your favorite stereo chorus modules or pedals to further enhance its vintage character. Explore the possibilities and let your creativity flow!