Category Archives: Eurorack Modular Workshops

EFFEXX String Filter workshop

A snappy noiseshot from the Delta CEP A2 turns into something different in the EFFEXX multi FX module RT-1701. The delaytime of the string filter is controlled by the Delta’s step sequencer. Maybe you have not noticed yet, that the step sequencer of the Delta CEP A2 does not only work with the internal sound engine but also with the KB-CV output of the Delta’s MIDI2CV converter.

 

Delta CEP A & RT-311 pairing instructions

I describe in detail how the communication between the DELTA CEP and the Swarm Oscillator RT-311get established. After the connection and setup, the RT-311 follows the notes one plays via MIDI with the DELTA CEP A. That means, in paraphonic mode, the RT-311 plays chords instead of multiple oscillators with equal pitch.

New DELTA CEP A workshop video spotted on youtube

Trade fairs are cancelled. Workshops are postponed. In times of the pandemic, product videos are a serious alternative. I had a video series on the DELTA CEP A in mind for a long time. The first part provides an overview, while the following parts deal intensively with the individual sections of the synthesizer. My personal highlight in this pilot episode is the use of the stereo tape delay of the FX section as a looping device for a spontaneous 5 minute improvisation. This version of the video is in German. An English version will surely follow if I receive demands for it. Anyway – the audio demos will not change at all in an english language version.

Small addendum to the production of the Delta CEP A video. In some audio examples, the audio encoder of the video output in Final Cut Pro was unsuitable. I had to filter waveforms and lower the level. But I still couldn’t get a few of the digital artifacts under control in a manageable amount of time. At least after a certain number of attempts, I was tired of filtering the waveforms more and more. It was poking in the dark. I knew the problems came from overtones that I couldn’t hear anymore, but my young listeners might. The Delta CEP A simply has extremely clear waveforms with overtones up to the Nyquist frequency. For this reason, here is a link to the uncompressed wave file with the audio samples that the encoder did not want to process properly. The unfiltered Swarm oscillator signals were particularly affected. In the analyzer of the Logic Pro X EQ you can very nicely observe how far the overtones in the DELTA CEP A range for rectangular, pulse and sawtooth waveforms.

      OriginalWave

Messen fallen aus. Auf Workshops wird verzichtet. In Zeiten der Pandemie sind Produkt-Videos eine ernstzunehmende Alternative. Eine Video-Reihe zum DELTA CEP A schwebte mir schon lang vor. Der erste Teil dient einer Übersicht, während sich die folgenden Teile intensiv mit den einzelnen Sektionen des Synthesizers auseinandersetzen. Mein persönliches Highlight ist die Nutzung des Stereo-Tape-Delays der FX-Sektion als Looping Device für eine spontane 5 minütige Improvisation. Diese Version des Videos ist in deutscher Sprache gehalten. Eine englische Version wird sicherlich folgen, wenn dieses Format Zuspruch findet.

Kleiner Nachtrag zur Produktion des Delta CEP A Videos. Bei manchen Audio-Beispielen zeigte sich der Audio-Encoder der Video-Ausgabe in Final Cut Pro ungeeignet. Ich musste Wellenformen filtern und den Pegel senken. Aber ein paar der digitalen Artefakte bekam ich trotzdem in überschaubarer Zeit nicht in den Griff. Zumindest hatte ich ab einer gewissen Anzahl von Versuchen keine Lust mehr, die Wellenformen mehr und mehr zu filtern. Es war ein Stochern im Ungewissen. Ich wusste, die Probleme kommen von Obertönen, die ich nicht zu hören vermag, meine jungen Zuhörer aber vielleicht schon. Der Delta CEP A hat einfach extrem klare Wellenformen mit Obertönen bis zur Nyquist Frequenz. Aus diesem Grund hier ein Link zu der nicht komprimierten Wave-Datei mit den Hörbeispielen, die der Encoder nicht vernünftig verarbeiten wollte. Betroffen waren vor allem die ungefilterten Swarm-Oszillator Schwingungen. Im Analyzer des Logic Pro X EQs kann man sehr schön beobachten, wie weit die Obertöne beim DELTA CEP A bei Rechteck, Puls- und Sägezahn-Schwingungsformen reichen.

      OriginalWave

New workshop Video: Radikal Technologies – Delta CEP A

We recently did a modular workshop at SchneidersLaden in Berlin. Workshops at SchneidersLaden are taking place always on Saturdays. They always start with a little modular improvisation. We are very happy that the staff at SchneidersLaden produced a great video of the entire workshop. So if you missed it you can watch it now. You will learn a lot about the Delta CEP A and in the second chapter about the Radikal Modules as well.

New workshop Video: Radikal Technologies – Delta CEP A

Radikal Technologies Workshop @ SchneidersLaden

Donnerstag, 20.02.2020 19:30

Jörg Schaaf aka Radikal Technologies will be in Berlin to talk about (and show) his latest synthesizer designs like the Delta Cep A. He is responsible for some modern classic synth designs from Germany – like the Spectralis and Accelerator. In the past years he mainly developed eurorack modules like the RT-311 Swarm Oscillator, RT-451 Dual Filter, RT-1701 Effexx or the semi-modular synthesizer Delta Cep A. His complex designs always bring a lot of functionality to the table and they can sound amazing.

See and hear for yourself during the workshop at SchneidersLaden.

Start: 7:30pm @SchneidersLaden

Participation is free / No registration required

Just Music Two Days Workshop Reihe mit Radikal Technologies Modular Workshop

Just Music veranstaltet wie jedes Jahr ihre Two Days workshop Reihe. Ich freue mich dieses Jahr mit einem Modular Workshop Teil der Partie zu werden!

Für die Termine in Hamburg und Berlin können bereits Tickets reserviert werden! Die Veranstaltungen sind kostenlos aber die Anzahl der Plätze ist beschränkt!

Workshop in Hamburg

Workshop in Berlin

Radikal Technologies will attend at the 2018 Modular Fest in Zurich. We are there on Saturday, 29.09.2018 from 1 pm to 23pm and will present some special features of our eurorack modules at 3pm in a dedicated workshop.

Zurich Modular Fest

Eurorack Modular Workshop: String Filter experiments

In this eurorack modular workshop video I explain the usage of the EFFEXX string filter algorithm. If you already have an EFFEXX module you probably also have the three additional modules I used for this workshop. For my sound examples I added one Noise generator, one ADSR envelope generator and one VCA. The workshop explains the cabling and gives a lot of tips how to tweak the parameters for different sonic results.

If you just would like listening to the string filter sounds, you can skip the first 4 minutes of the video.