Delta CEP A continuous Waveform selection

Moogfest 2018

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Our distribution partners in the US welcome you at their Moogfest 2018 Modular Marketplace booth. They will showcase the Delta CEP A with the all new snapshot interpolator feature.

Delta CEP A continuous Waveform selection

Delta CEP A drum-sounds demo

Posted Leave a commentPosted in Audio Demos, Delta Cep A, Downloads, Eurorack Modules, Radikal Technologies

People often ask us, whether the  Delta Cep A is capable of producing drum sounds. So we created this little demo for you. We programmed drum sounds, sampled them and transferred them into the Spectralis. Afterwards we programmed a couple of patterns and played a little drum session with it. While the patterns were running we tweaked the FX-returns of the mixing desk. We only used the internal FXs of the mixer – the plate reverb with a very short reverb time and the LoFi delay.

Here is a little audio demo:


The Spectralis SLC files can be found here:
Spectralis sample sets

Below you can listen again to the same sound demo. But this time we added some compression. We used the Logic Pro-X Classic VCA compressor with limiting!

Delta Cep A desktop version

Radikal revealed upcoming desktop version!

Posted Leave a commentPosted in Delta Cep A, Eurorack Modules, NAMM2018, News, Radikal Technologies

01/20/2018 Fernwald – Namm 2018 news

Radikal Technologies announced today, that they are going to release a desktop version of their awaited semimodular, paraphonic synthesizer DELTA CEP A. The Delta Cep A desktop case is just the first family member of a complete range of eurorack compatible cabinets that we will see from Radikal this year, said Jörg Schaaf.

Eurorack Synth Voice

Delta CEP A – Paraphonic semimodular synthesizer

Posted 4 CommentsPosted in Delta Cep A, Eurorack Modules, News

NAMM 2018 News: Radikal Technologies presents the Delta Cep A – a semimodular paraphonic synthesizer voice

The Delta Cep A is the perfect starting point into the eurorack modular world. A MIDI to CV Interface, Oscillators, Filters, LFO, Envelope Generator, Mixer, VCA and a FX section and even a memory sequencer/interpolator for new incredible sound FXs. Each section has inputs and outputs and adds a lot of power to any already existing modular synth. The Delta CEP A can also be used totally independent from any Eurorack frame with our Delta CEP A desktop casing. Even without patching one single cable, the Delta can be used as a powerful solo synthesizer and Chords/Pads machine.

The Interpolator stores patch memories of the synthesizer and allows for automatic sequential recall and crossfading between these patches.

-Interpolator/Patch Select knob

-Manual Mode/Shift

The MIDI to CV Interface controls the internal synthesizer and external synth modules.

-MIDI Learn Button


-Clock Reset


-Waveform Select

Control Voltage Inputs:

-LFO Out

Swarm Oscillator
The swarm oscillator is a bank of up to 8 oscillators that can be tuned in chords, clusters or fat detuned multi-oscillator sounds.

-Wave/TLM knob
-Pitch knob
-Detune knob
-Mod Depth/ Mod wheel depth
-Swarm density

-Paraphonic mode switch button

Control Voltage Inputs:
-TLM and Waveform Modulation
-1V/Oct Pitch Input

Swarm Oscillator Output

The mixer controls the balance between external signals, the swarm oscillator and the noise generator.

-External/Noise Level
-Oscillator Level

Control Voltage Inputs:
-External Input
-Modulation Input

-Mix Output

Analog Multimode Filter & Digital Multimode Filter
The Delta has one analog and one digital multimode filter to choose from.

-Cutoff Mod/KB-Scale
-EG-depth/ Velocity

LP, BP and HP switches

Control Voltage Inputs:

-Filter Output

ADSR generator
The ADSR Generator creates fast, snappy envelopes and offers CV control over Attack and Decay times.



Trigger Input

Control Voltage Inputs:

Envelope Out




Control Voltage Inputs:
-FX In Left
-FX In Right

-Dry Out

FX Section
The FX section is the perfect addition to this synthesizer voice.

-Time/Modulation Rate
-Feedback/Modulation Depth

-Out L
-Out R

  • 200 mA +12V
  • 50 mA -12V
  • 0 mA 5V
  • 23 mm deep