Type: Module

Category: Filters

Updated: Jul 10, 2020

Manufacturer: MRB

Contact Manufacturer


Included in the MRB Luxury Filter Bundle

Syrup gives you the option of sounding like "Ripples" or sounding like no other filter sounds! This could be my most used filter in Voltage Modular..I haven't found anything it can't do yet! --Sean Clarke, Ripples & Liquid Filter owner / 500hp Eurorack hardware enthusiast

Syrup is the "liquid filter" for Voltage Modular. --rfj (the guy that started this ball rolling)

That's what the beta testers had to say about Syrup which is a derivation of Mutable Instrument's Ripples filter. It is a software emulation of the latest hardware version. It was developed from scratch by MRB and shares nothing in common with the software version that runs on VCV Rack. In fact, Syrup offers more features and versatility than either the hardware or VCV software versions. You will only find Syrup here, as we have no intention of ever doing development for VCV.

Syrup and poly Syrup are teaser modules for a massive new filter bundle that is in the works. I thought I'd release Syrup just to give you a taste. Of course, the purchase of Syrup is fully credited toward the bundle. Give it a try free for 7 days. Everyone who has heard this filter has fallen in love.

Demo sounds are on the Syrup Bundle Page.


To begin with, Ripples2020 offers 3 output jacks which are globally switchable between 12 and 24db slopes. In contrast, Syrup provides 9 simultaneous outputs. Mixing these in various combinations or taking them across a stereo pair yields amazing, unique timbres and stereo images. Ripples now offers a hard clipping input along with a drive control. Syrup has a similar arrangement except you are allowed to turn the clipping on and off while retaining the variable drive. Ripples has a fixed gain compensation circuit which prevents gain reduction as resonance is increased. Syrup provides user variable gain compensation so you can use however much you need, from zero to overcompensated.

All these extra features are brought to you in the spirit of true modular synthesis. We don't believe that it is the job of module manufacturers to make all the aesthetic decisions for its users. Some modules have a signature sound, and that's fine, but what if you want something different? We'll give you the knobs.

You might have noticed that Syrup is missing the VCA. The VCA in Ripples is dedicated to the LP4 output and we feel this lacks versatility. So instead, we developed the VCA3080 module to use as a companion and still keep a faithful circuit emulation. You are encouraged to plug the various Syrup outputs into the (+) and (-) inputs of the VCA3080 and play the phasing game to your heart's content. Doing so multiplies the number of responses many times over. Mono and poly VCA3080s are included free in the Syrup bundle.


Starting from the top you will find the initial Frequency cutoff and Q(resonance) knobs. Turning the Q knob all the way up brings on self oscillation. Between them is a frequency range switch. HI=audio, LO=subaudio. The LO range is best used when the filter is self oscillating. The various outputs will produce sine waves at different relative phases.

The next row down are the 2 cutoff modulation inputs, CV1 and 2, and the Q modulation input, CVQ, with their attenuverters.

Below these starting with the CLIP on/off button and continuing straight down are the GAIN COMPensation control, input DRIVE control and audio INput.

The block of 9 jacks to their right are all the various outputs:

  • HP1 - 1-pole highpass, 6db/oct
  • HP2 - 2-pole highpass, 12db/oct
  • LP1 - 1-pole lowpass, 6db/oct
  • LP2 - 2-pole lowpass, 12db/oct
  • LP3 - 3-pole lowpass, 18db/oct
  • LP4 - 4-pole lowpass, 24db/oct
  • BP2 - 2-pole bandpass, 6db/oct both slopes
  • BP4 - 4-pole bandpass, 12db/oct both slopes
  • NOTCH - band reject, heard best at low Q

A word about Q, clipping, gain compensation, and drive: All these controls interact. With this type of filter, it is possible to step on and squash the resonance with too much input signal. Try it yourself and use the oscilloscope to watch the results. Patch in a low pitch sawtooth, use fairly high resonance (Q), and then turn up the DRIVE. Resonance gone. Now turn on the CLIPping and observe how the resonance returns. Different behavior can be had with the various settings, so experiment to find the right amount of delicacy, grit or grind you're looking for.

If you're curious about what inspired this filter to be created, read this thread:


Mar 30, 21

Pure Magnificence

There's a renaissance in legacy tube designs from yesterday's era in a multitude of magnificent designs from brand names like Bendix to Magnavox just to name a couple of known names. The beauty of this filter is that it has that tone in the box and you can push it to introduce non linear noise, there are many flavors onboard, and the possibilities are enormous. Creating your own instruments, effect systems, mixing, mastering, and tone control are a few intensions that can be observed. Another angle, could be that Syrup can be used to prototype future hardware designs. MRB is High Fidelity and Mark hits another Homerun with the entire Luxury Filter, though I had to mention Syrup, this time around because it's Sweet. Not to mention though to mention Spicy too . . .