Yamaha CS30 service and external clock modification

video upload by Jörg Schaaf

"The internal sequencer of the CS30 does not sport an external sync input for the internal sequencer. Furthermore, the CS30 circuitry is designed for 15 Volt gate signals. Eurorack synthesizers are specified with 5 Volt trigger signals. The modification adds an external input at the backside of the synth. When you set the sequencer to manual mode, the external input is active. It does not replace the manual button. Instead it's adding a second sync source. That means, you can still select the starting step of the sequencer line with the manual button.

Are you looking for a synthesizer workshop or do you want to add mods to your vintage synth? Then maybe my synthesizer-service.de website is a good starting point.

https://www.synthesizer-service.de"

EMS Logik Demo

video upload by Jörg Schaaf

"I recently had an EMS Logik Synthesizer at my synth repair workshop. I could not resist recording some bleeps with it before it get's picked up again by the owner. I must say, I really love that synth. The form factor, the deep sonic landscapes it paints and last but not least the light weight of the case!"

synthesizer-service.de: Test after service & repair: ARP 2600

video upload by Jörg Schaaf

"I have been offering a synthesizer repair service since December 2025. While I had previously only occasionally breathed new life into the odd instrument, the closure of Radikal Technologies GmbH sparked a desire to find a way to continue pursuing my passion for synthesizers. When you have been personally involved in synthesizer development, the repair process constantly triggers moments of déjà vu alongside new insights. That exciting moment when an instrument is finished and invites you to play it again makes up for the days of work often poured into it.

This ARP 2600 had a variety of issues. The keyboard was in poor condition—with some broken contact springs—the voltage processor wasn't working, the oscillator scaling was terrible, all the faders were scratchy, and tuning the oscillators was an ordeal.
But time and love heal all wounds. Doesn't it sound great? The ARP 2600 is an absolute classic, and its sound possesses plenty of character, warmth, and precision.

https://www.synthesizer_service.de"

Jörg Schaaf was also the man behind Quasimidi and now Radikal Technologies.

Prophet X Sample Library Volume 1: Demo 1

video upload by Jörg Schaaf

"In this video I demonstrate 5 out of 128 sounds of my Prophet X sample library Volume 1. You can purchase a license for this library under the following link:

https://www.joergschaaf.de/wordpress/..."

Ambient Improvisation

video upload by Jörg Schaaf

"1,859 / 5,000
It's been quite a while since I produced and uploaded my last live video. With this video, I want to make a fresh start and produce more videos from my studio in the future. Therefore, this improvisation is quite simple. The Prophet X plays two sequences of different lengths using a sound from my Prophet X Sample Library Volume 1, which is available on my website and will be presented in detail here on YouTube soon.

https://www.joergschaaf.de/wordpress/...

The Spectralis plays a deep bass note every two bars and runs unsynchronized at the same tempo as the Prophet X (119 BPM).

I play a few melodies on my Minimoog, which has faithfully accompanied me for almost thirty years. It's a kind of farewell to a beloved synthesizer that I unfortunately have to part with. You can find it on the German online classifieds site Kleinanzeigen.

(https://www.kleinanzeigen.de/s-anzeig...)

The Minimoog is in very good condition. I've maintained it regularly over the years, and it underwent a complete overhaul last week. This Minimoog is equipped with a Lintronics MIDI converter, which includes an additional LFO and other modifications. Thanks to retrofitted precision trimmers, the oscillators are significantly easier to tune and more stable than the original.

The sound of a Minimoog is very organic and majestic. I emphasize the vintage character of this little instrument by using the Valhalla DSP Delay plugin. This plugin produces wonderfully glorious noise and distortion on demand, adding even more life to this session."

Lichtmaschine

video upload by Jörg Schaaf

"Bauhaus 1930
I visited the Bauhaus Museum in Dessau and stepped into this beautiful machine from 1930 - The Lichtmaschine. I had no tripod and filmed it with my mobile phone only. I created the soundtrack with the Prophet X sample synthesizer from Sequential and some of my own samples."

Time of change - Jörg Schaaf to Leave Radikal Technologies

video upload by Jörg Schaaf

"I've always had a passion for underrated synths. In 2003 I decided to help create one myself. In 2004, the Spectralis was born and quite successful in this metier. Now that my time at Radikal Technologies is coming to an end, it's time to explore new avenues. Perhaps I should go in a completely different direction and try my hand at overrated or valued synths. Where exactly it will take me isn't 100% certain yet, but I'll be tackling it with passion again."

And from the comments for the video:

"I've worked as a freelancer at Radikal Technologies for the past 25 years. It was a time of ups and downs, but I wouldn't want to miss it. After all, I was given the opportunity to bring synthesizers to market that met my exacting sound expectations. Since our managing director is retiring from the business due to age, Radikal Technologies won't be around much longer. For this reason, I've now voluntarily stepped down, as no further products will be developed under Radikal."

Roland Aira P6

video upload by Jörg Schaaf

"A little dirty demo of a great little tool!"

Jörg Schaaf is the man behind Radikal Technologies and previously, Quasimidi.

Little Saturday Evening Improvisation w/ Jörg Schaaf of Radikal Technologies

video upload by Jörg Schaaf

"Loaded a couple of samples into the VPME quad drum module and had some fun with Delta CEP A 2, EFFEXX, Solina and Kobol clone, beatstep pro and keystep."

Dung beetles ambient

video upload by Jörg Schaaf

Jörg Schaaf is the man behind Radikal Technologies and previously Quasimidi.

"'Elegant new experiments show that on clear nights and in the absence of other celestial cues, dung beetles can orient their routes to the band of stars known as the Milky Way.'
James L. Gould"

https://joergschaaf.bandcamp.com

Step Sequencer Meditation

video upload by Jörg Schaaf

"What I really love about #Eurorack is the fact, that you can quite easy built your own desired feature into a little module and use it for your #music. Here I used the 960 sequencer in combination with the #deltacepa 2 and built a little module to create #cv controllable #gates for the clock #oscillator output of the #stepsequencer. It seems like, I should design my own step sequencer. If you listen focussed you will notice, that two #sequences are running simultaneously. They are running at different speeds. So the sequences will drift out of sync a couple of times and running together again. This gives a nice atmospheric shift. stock footage from #pexels .com"

cars on planet earth

video upload by Jörg Schaaf

"Befaco Rampage & EFFEXX & Valhalla Vintage Reverb at post processing. I recorded 10 minutes of noise and took snippets out of it to arrange them in a kind of collage in Logic. Some of these sounds received a special sonic character by adding some Valhalla reverb effects."

https://joergschaaf.bandcamp.com

Jörg Schaaf is the man behind Radikal Technologies, and previously Quasimidi.

Flute sounds with the string filter of the EFFEXX multi FX module.

video upload by Jörg Schaaf

"The EFFEXX's string filter does not only create short, percussive sounds. If you choose negative feedback and apply less filtering to the feedback path, you get some flutish sounds out of noise. This time, I increased the attack time of the noise and added some decay to the noise sound. The pitch once again is controlled with the MIDI2CV converter of the Delta CEP A2. The CV output connects direct to the control input of the EFFEXX.
The backing at the end of the short video is from the Accelerator. Still my favorite choice for subtractive polysynth sounds."

EFFEXX string filter example

video upload by Jörg Schaaf

"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."

TNT Jam @Home

video upload by Jörg Schaaf

"German text below
After many years of abstinence from the stage, I had the chance to present my music live and in front of an audience on November 17, 2023. This was a big challenge and involved a lot of effort, but it was great fun. With this video I would like to thank everyone who attended my concert. To all my friends who unfortunately couldn't make it for various reasons, I would like to present a small excerpt of what they could hear and see this Friday in the 'Theater neben dem Turm'' in Marburg.

My rig was of course equipped with many Radikal Technologies instruments. In addition to the obligatory Spectralis 2, you can hear the Accelerator and two Delta CEP A2s. I would particularly like to mention Crumar's Mojo 61 as additional instruments. I love this Rhodes emulation. A Roland JD-08 and a Behringer K2 are also used, which can throw in a few bad sounds here and there.

The whole session was recorded with 24 tracks directly into the Allen & Heath CQ20B stage mixer, which I recently integrated into my setup for live events.

The main camera is a Blackmagic Pocket Cinema Camera 4K (BMPCC4K) with an MFT sensor. I especially love this sensor format because there are an incredible number of inexpensive vintage lenses that inspire creativity. You can see a TTArtisan 17mm, F1.4 in this video. It produces a great image with the camera and only cost 100 euros."

https://joergschaaf.bandcamp.com

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Delta CEP A V2 Sequencer Workshop

video upload by Jörg Schaaf

"In this video I am providing some tips for the new step sequencer at the Delta CEP A. I also explain, how to create sequencer sounds with liveness with the Delta's soundengine. I hope, you enjoy this video.

Check the new 2020 album Imaginary Journey:
https://joergschaaf.bandcamp.com/albu...

The 2017 album 'Indiscreet' is available at my bandcamp page:
https://joergschaaf.bandcamp.com/albu..."

17. September 2023

video upload by Jörg Schaaf

Jörg Schaaf is the man behind Radikal Technologies, and previously Quasimidi.

"Played with my new macro lens today - and with the DELTA CEP A2 of course!

Check the new 2020 album Imaginary Journey:
https://joergschaaf.bandcamp.com/albu...

The 2017 album 'Indiscreet' is available at my bandcamp page:
https://joergschaaf.bandcamp.com/albu..."

Delta CEP A2 - Little improvisation

video upload by Jörg Schaaf

"A little improvisation with two Delta CEP A2 synthesizers. You will get an impression of the new Performance Step Sequencers. Allows for adding and removing notes at all positions of the sequence during playback & transpose.

In the beginning I set the left Delta into hold mode. That plays a note or chord until a new note or chord is played."

Radikal Technologies RT-451 filter test

video upload by Jörg Schaaf

"After finishing the calibration, it's always a pleasure, to do some additional tests with the filter as it sounds so juicy!"

A Happy New Year 2023! from Radikal Technologies' Jörg Schaaf

video upload by Jörg Schaaf

"A big thank you to all subscribers and watchers of my videos! So glad to be here and so excited to have this platform to share my work! I wish you all a wonderful 2023, good health and that all your wishes come true!

Check the new 2020 album Imaginary Journey:
https://joergschaaf.bandcamp.com/albu...

The 2017 album 'Indiscreet' is available at my bandcamp page:
https://joergschaaf.bandcamp.com/albu..."