Doepfer A-116 Voltage Controlled Waveform Processor Video Tutorials by Raul Pena

Raul Pena just started a new series on the Doepfer A-116 VC Waveform Processor.

Video 1: Doepfer A-116 VC Waveform Processor Basic Features

" A short introduction to the features of the Doepfer A116 Voltage Controlled Waveform Processor. A short demonstration with audio is included. Video one of three.Sound and Video by Raul Pena."

Video 2: Doepfer A116 VC Waveform processor-Audio/Oscilloscope Views Pt.1

" Continuing the Doepfer A116 VC Waveform Processor series. This time we look at oscilloscope views of the effects of the A116 on a basic Sine and Triangle Wave. Video Two of Four in series..Sound and Video by Raul Pena."

Video 3: Doepfer A116 VC Waveform processor-Audio/Oscilloscope Views Pt.2

"Continuing the Doepfer A116 VC Waveform Processor-Audio Oscilloscope segment. This time we look at more oscilloscope views of the effects of the A116. Video Two of Four in series..Sound and Video by Raul Pena."

Video 4: Doepfer A116 VC Waveform Processor- Modulation Effects Pt. 1

Continued exploration of the Doepfer A116 Waveform Processor. In this video we look at a few modulation patches with simple waveforms. Sound and Video by Raul Pena.

Video 5: Doepfer A116 VC Waveform Processor- Modulation Effects Pt. 2

Continued exploration of the Doepfer A116 Waveform Processor. In this video we look at a few modulation patches with simple waveforms. Sound and Video by Raul Pena.

Check out Raul's latest survey at http://www.surveymonkey.com/s/K3Z9PVF

Other places to find Raul's World of Synths on the Web:

raulsworldofsynths on YouTube

raulsworldofsynths on Vimeo

raulsworldofsynths on SoundCloud

raulsworldofsynths at iTunes

raulsworldofsynths at CDBABY

New Doepfer Re-Designs Due to CA3080 Shortage

After the unplanned re-design of the Dark Energy (due to the unavailability of the CEM3394 chip ) there now seem to be more re-designs of Doepfer Modules coming up.

This time the problem is the availability of CA3080 (and 3080E) chips.
The CA3080 (datasheet PDF) is a 2MHz Operational Trans-conductance Amplifier (OTA), which is used in quite a few Doepfer (and other brands) modules and there seems to be no direct replacement equivalent.
The original chip itself hasn't been produced since 1975 and the wafers have all been used up a couple of years ago, according to some sources.

No-one seems to have decent stock anymore, and there was a buying craze when it went out of production.

That does mean that some Doepfer modules have to be re-designed in the near future because of this obsolete integrated circuit ( like the A-107, A-116, A-127, A-130, A-131, A-132-1, A-141, A-142-1, A-147, A-171). 

This will take a lot of precious time for Doepfer that would otherwise be spent on manufacturing new modules.

Sadly these re-designs will not have any obvious benefit for the customers.

A-116 Voltage Controlled Waveform Processor

Another good way to mess up your audio (and CV signals) is with the A-116 VC Waveform Processor module.

After the input amplifier, the signal goes through two parallel processors: a clipping circuit, and an asymmetrical amplifier.
In a way you could see this module as a cut-down version of the A-137-1 that i reviewed in an earlier post.
Cut-down, but still very effective...

The processed signals are added together and sent to the output.
Clipping-Level and Symmetry amounts are manually controllable, but can also be modulated by control voltages like ADSR's, LFO's, Noise, etcetera.

It is a fun module to experiment with, although i haven't used it in a while.
Take a look at the video by Hawklord2112 that gives a nice impression of what this module can do.

Video: A-116 Demo

" basic functions of the A116 VC Waveform Processor from Doepfer. "

Find more of his videos at http://www.youtube.com/hawklord2112