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Do you need good lead lines in your production? A synthesizer, biting hard or teasing soft? A synthesizer, flexible to bend to any kind of synth sound? JellyFilter is the solution.

JellyFilter was copied from a red Swedish lead synth idol (which is available in 3 versions to my knowledge) and implies some more functionality, at some point less functionality.

Current download of jellyfilter is available under software.neuenberger.de

Technical details:

Polyphony / Timbrality:

Max 8 voices (additionally it is depending on CPU power and complexity of voice), 1 channel.


3 Oscillators per voice with Controllable Detune (Unisono) per Osc: Saw, Sine, Square, Pulse with PWM, Noise (Osc 1+2) Pitchbend +/- 12 Halftones


Poly, Mono and Legato (Like mono, but does not restart Envelopes if Voice is not released)


12dB and 24dB LowPass and Bandpass with resonance, Highpass, envelope amount and cutoff, possibility for self-resonance (protect your ears)


ADSR for the Amplifier section, ADSR for the Filter section. Both Linear and Exponential available.


Portamento, Distortion, FM OSC 2-> OSC 1, FM OSC 3-> OSC 1, Sync Osc 1 to Osc 2, Bit Reduction (Lo-fi effect) Extra Distortion for Osc 3. Chorus with Rate, Depth, Delay and Type (Triangle, Saw, Square).


Attack Decay Envelope: Either to FM amount, to OSC 2 or to OSC 3. Fast and Slow available

LFO Modulation Parameters:

Types: Saw, Triangle, Square, Random

Rate and Amount

Destination: to OSC 1+2, to OSC 2, to Filter, to PW

Optional Sample and Hold (+Synchronize to tempo)

fm bass
fat pad
mad psycho
fat pad II
electric process
mad feedback
funky appregio
gangway move

Since a picture says more than 1000 words, I put a screenshot here for the time being (Click on the image for details).

Jellyfilter v2.0 Screenshot


01 November 2011: JellyFilter 3.8 planned and Facebook Community launched

There was a lot of time that passed by since my last updates, I am currently very involved in other work, for there are bills to pay ...
Since there is a version sleeping on my development PC with lots of improvements I hope to bring it out at the beginning of next year. I will call it JellyFilter v3.8. Planned major features are:
  • More variations of oscillators that allows to choose shape variations for Osc 1 and Osc 2.
  • Delay
  • Appregiator Musical functions: LFO 1 will get the possibility to hold musical levels, such that it can play certain notes repeatedly, e.g. Octave+Fifth, Major Notes, Octaves, all notes. Combined with noise this can play random tunes as well!
  • Additionally there will be attenuation and release for LFO so that the amount can be changed along the time a sound is played.
  • Architecture: There will be the possibility to variate the architecture, i.e. the audio flow of a sound, so that e.g. fx is before filter or after filter etc.
  • AHDSR Envelope for the Amplifier section
  • Both Envelopes of Filter and Amplifier section get a "repeat count": This functionality allows to create sounds like handclaps. The Envelope is looped in the phase of A-H-D until the repeat count has been reached, then the Sustain Phase is initialized. This means a boost in sound creational possibilities for JellyFilter.
  • More knobs in kind of "submenus", so if you press the "special" button which is placed in certain sections (Like LFO, Osc 1+2, Delay) Knobs below the "display" get a contextual meaning and you can turn these knobs to change the sound. This is a user interface change, it means that there will be a number of "invisible knobs" and it allows to place a lot more functionality on the small "panel" that is available on a users screen, buttons that are used often will of course remain on the panel, but others which are known to be used only rarely are put in submenus.
Talking about facebook there is a community which I launched to give JellyFilter users the chance to get connected with each others and to exchange sounds etc. and to also post. That would be great! You can reach the new JellyFilter Facebook community by following this link.
So talk to you on facebook. I will answer questions there. Demand for a Mac version of JellyFilter will be met in spring 2012. I will keep you updated.


01 November 2011: Now donation is possible via paypal

You now have the possibility to support development of JellyFilter not only by clicking ads on the download page, and also to click on one of the buttons below:

EUR (Is my favourite currency):








30 July 2008: JellyFilter v3.0.1 available

As mentioned earlier the product was tested and working well on Cubase SE without any issues. Now I was running a test with Cubase Essential 4 to see that there is a major latency problem and I figured out what it is and made a quick fix of it ... there was simply a wrong assignment of a wrong constant latency.
Additionally JellyFilter version 3.0.1 now supports pitchbend commands.


28 July 2008: JellyFilter v3.0 available

Since version 2.0 a lot of development effort has been put, there are a lot of more ideas, but here it is. Summarized, we added Oscillator 3, Legato Mode, Lo-Fi "Distortion", either 12 dB or 24 dB Filter Steepness, Sample and Hold for LFO Modulation, Exponential or Linear Envelopes, Fast/Slow Modulation Envelope. Here in detail:
We added an Oscillator 3 that can be used as subbass or additional FM source to Oscillator 1. It also has its own additional Distortion.
A standard Chorus now can fatten the sound even more. The Chorus can be adjusted by Dry/Wet, Rate, Depth, Delay and Type (Triangle, Saw, Square).
For 303-type sounds there is now a new mode called Legato: This will not restart the envelopes until the voice is completely released which can be useful for smooth crossovers between different notes.
For Lo-fi enthusiasts there is a Bit Reduction (BitRed) functionality that can reduce the information down to 2 bits. Old Digital-sounding Video-Console sounds can be created with this easily.
Filters can be set up either to 12 dB or 24 dB steepness which allows the user to produce "warmer" sounds with the 12 dB option.
The LFO Modulation has been accompanied with a Sample Hold (S/H) functionality that can be synchronized to the tempo of the music.
Envelopes for Amp and Filter now can be switched to exponential as well. This results in even smoother envelopes.
Finally the Modulation Envelope ("Mod-Env") can be fast or slow - you choose! If you need a slow sync-sound, you will choose slow, for the booming bass probably fast :)
From the performance point of view we tested the following in our premises: On a 2.0 GHz Intel(R) PC it was no problem to play 9 notes concurrently (Full complexity, i.e. Bandpass filter 24dB, Exponential Envelopes, Chorus enabled, Osc 3 used), on a 1.5 GHz Intel(R) Celeron(TM) 6 at the same time (same complexity). As VST Host we used Cubase SE.


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