Category Archives: Downloads

Delta CEP A & A2 version 2 & new manuals

We are happy to announce, that the new firmware release version of the DELTA CEP A and it’s successor, the DELTA CEP A2 is now online! New manuals have been written to make sure you benefit from all new features from the first moment. The manual contains a detailed update procedure. Beside enhancements for the user interface we added a performance step sequencer and full MIDI parameter control. The Desktop versions even sends all knob movements out.

Firmware Version 2.0 from September, 7th 2023

Manual UK/USA (English language version):
Manual DE (German language version):

Delta CEP A missing presets download

Unfortunately we shipped 6 units to different dealers with the new OS 1.5 but without the preset data. Below you’ll find two soundfiles with the missing preset data. One of them overwrites the USER PRESETS and the other one overwrites the ROM Presets. A big sorry to customers, who received a unit without our soundset.

The installation of the soundsets is quite simple:
1.) Connect the audio player output to the external input in the MIXER section of the DELTA CEP A which is just between the oscillator and the filter section. It is not necessary to setup the ext. signal level as the unit detects the input data independent from the set gain.
2.) Set the DELTA CEP A into PATCH SELECT mode by hitting PATCH if not already done.
3.) Play the complete file to the Delta CEP A. The LEDs left from the big knob will show the progress. It will count the snapshot memories 40 times for 40 presets with green LED lights for USER memories and yellow for ROM presets. If the level is too high the LEDs turn red. In that case just restart from the beginning with less volume.
4.) When the file has been received completely, the unit will show the pink LED lights of the PATCH SELECT mode again.

WARNING: The file with the User presets overwrites all your own user presets. But you can backup them. You’ll find all informations about that in the owners manual.

Delta CEP A Version 1.5 released

We are pleased to announce that our DELTA CEP A and DELTA CEP A Desktop products have received an extensive update. This firmware update is available to all customers and our dealers free of charge. Devices that we have delivered since 09.09.2019 have already been equipped with this new firmware.

The following features are additions by the new version:

  • the [SHIFT]-key can now be locked in, additional parameters can also be reached without holding the [SHIFT]-key.
  • In addition to the previous effects, there is now a reverb that can be used simultaneously with the other effects.
  • The LFO can now be routed to a lot of destinations without patch cords. 
  • The ADSR can now be routed to a lot of destinations without patch cords.
  • Each modulation target has an independent modulation strength setting.
  • The sound programs of the DELTA CEP A can now be switched over via MIDI.
  • The LFO can now be synchronized directly to a square wave signal.
  • The volume and  saturation intensity of the oscillator signal can now be modulated by a control voltage.

Download the new version now!
Firmware download:
Delta CEP A Version 1.5

Manual english:
Version 1.5 Info PDF english

Handbuch deutsch:
Version 1.5 Info PDF deutsch

Delta CEP A drum-sounds demo

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!


New firmware version for the Swarm Oscillator – Neue Firmware für den Schwarm Oszillator

A new firmware has been released for the RT-311 Swarm Oscillator. This updates offers an improved FM quality. You maybe already recognized tickering sounds when tweaking FM parameters. We thought, lin. and exp. FM will benefit from a new Firmware, that refuses these sounds from coming up.

That is the first firmware update for the Swarm Oscillator. The active firmware shows up during Startup. The uppermost LED lights up blue and the next to the right red, if the firmware is already installed. If not, please check my step by step instructions below:

1.) Download the audio file at the following link or use the audio player below:
2.) Connect a cable from any audio player to the Swarm Oscillator’s SPEED Input.
3.) Load the update wave file into an Audio player like VLC Player, Itunes, Media Player etc. or play the file direct with the audio player below. The new version is called “SwarmVCO_V1.2.wav”.
4.) When you hit the play button, you will see a progress instantly in the LED ring. At the beginning of the transmission, the Oscillator enters the UPDATE mode. The entering shows up as a red LED animation. After that the first LED starts to run through all the colors multiple times. Each LED stands for a received Data block. As soon as a block has been received completely, the according LED turns from a purple LED color to white. So you can watch the transfer progress by checking the white LEDs. When all LEDs turned to white and the data has been checked to be OK, all LEDs will turn red for a couple of seconds. It is very important, that your have no power fail during these five seconds. When flashing has been completed successfully, all LEDs will light up green. Now you can reboot your Oscillator by powering down and up.
5.) During the data transfer something can happen. Maybe a power loss or your player jumps to a different track, the cable get diconnected etc. In such a case the LEDs turn red again. You can simply start the transmission again from the section, where the upload was still OK.
6.) The update procedure requires 4 minutes and 20 seconds.

Finished? OK – then let’s try the new FM quality of your Swarm Oscillator!

This player plays the firmware file – that is not an audio demo! Dieser Player spielt die Firmware Daten ab. Es handelt sich nicht um eine Audio Demo!



Für den RT-311 Swarm Oscillator ist eine neue Firmware erschienen. Das Update enthält eine stark verbesserte FM Modulation. Vielleicht hatten Sie es bereits bemerkt. Bei der bisherigen FM Modulation war stets ein rhythmisches Knacksen zu vernehmen, was einem den Spaß an der FM Modulation etwas verhagelt hat. Wir dachten, die meisten Anwender werden sich sicherlich über eine neue Version freuen, die diese Störgeräusche eliminiert.
Dies ist das erste Firmware Update für den RT-311 Swarm Oscillator. Wenn Sie unsicher sind, ob ihr Modul das Update bereits erhalten hat, schalten Sie es einfach ein. Bei aktiver Version 1.2 leuchtet die LED auf 12 Uhr blau und die rechts davon rot. In dem Falle brauchen Sie kein Update durchführen.

Folgendermaßen wird das Update durchgeführt:

1.) Laden Sie das Update unter dem folgenden Link oder verwenden Sie den Wave-Player oben.
2.) Verbinden Sie den Ausgang ihres gewählten Audio Players mit dem SPEED Eingang des RT-311 Swarm Oscillators.
3.) Laden Sie die entpackte Audio Datei in einen Player ihrer Wahl (VLC Player, Media Player, iTunes etc.) und starten Sie die Wiedergabe. Bei dem Player in diesem Artikel müssen Sie lediglich die Play-Taste betätigen.
4.) Wenn Sie die Play-Taste betätigt haben, läuft zunächst eine Leucht-Animation mit roten LEDs ab. Sie zeigen an, dass der Oszillator in den Update Modus versetzt wird. Direkt im Anschluss beginnt die erste LED mit einer Farbanimation. Die übrigen LEDs leuchten rosa. Sobald ein Programmblock geschrieben wurde, wechselt die Farbe der aktuellen LED von rosa nach weiß. Zeitgleich beginnt die Farbanimation der nächsten LED. Die Firmware ist in ihrer Gesamtheit übertragen, sobald alle LEDs weiß leuchten. Nach der Übertragung startet automatisch der Flash Vorgang. Während des Flash Vorgangs leuchten die LEDs rot. Während dieser Zeit darf der Strom nicht unterbrochen werden. Das Gerät muss sonst zum seriellen Flashen in den Service. Das Schreiben der Firmware dauert lediglich 4 Sekunden. Wenn das Flashen beendet ist, leuchten alle LEDs grün. Nun müssen Sie noch einmal rebooten, in dem Sie den Strom aus- und wieder einschalten. Danach ist die neue Firmware im Einsatz.
5.) Wenn etwas schiefläuft, passiert dies in der Regel während der Übertragung der Daten. Jemand startet aus Versehen zusätzlich eine andere Audio Wiedergabe oder zieht das Kabel ab. So etwas ist schnell passiert. Der Swarm quittiert einen solchen Übertragungsfehler mit rot leuchtenden LEDs. Zusätzlich läuft die Animation der aktuellen LED weiter. Wenn Sie einfach die Wiedergabe vor den Bereich des Übertragungsfehlers neu starten, nimmt der Oszillator die Übertragung mit dem aktuellen Block wieder auf.