Saturday, September 26, 2015

Doepfer A-110-4SE Special Edition Quadrature Thru-Zero VCO

Interesting times for the Doepfer collectors.

After the A-124SE Doepfer WASP special edition was announced almost 2 months ago, Doepfer now releases the A-110-4SE Zero-Thru Special Edition module.

From about middle of October a special edition of this Quadrature Thru-Zero VCOs A-110-4 will be available as A-110-4SE.
The special edition is equipped with a blue anodized front panel and white knobs.
The price will be 140 Euro

Blue and white seem to be the colours of the Bavarian flag... #Oktoberfest reference?


This picture appeared later. Probably explaining the colour-scheme better...

Thursday, September 03, 2015

Doepfer A-100SSB Small Power Supply/Bus Announced

A-100SSB is a combination of power supply and bus board with 8 connectors for A-100 modules. Planned for applications with up to 8 modules and a max. current of 380 mA. A-100SSB is available as ready built and tested unit.

A-100SSB Prototype I
These are the most important features:
- wide range mains voltage input 100-240V AC / 50-60 Hz
- IEC inlet on board for the connection of a suitable mains cable (a suitable cable has to be purchased by the customer locally)
- switching supply with +12V/380 mA and -12V/380mA for the operation of A-100 modules up to 380 mA total supply current
- safety cover at the bottom side (covers all elements that lead mains voltage)
- on board fuse
- 8 bus connectors
- LED displays for +12V, -12V and +5V (+5V are available only if e.g. the 5V adapter A-100AD5 is used)
- Dimensions: about 270 mm (length) x 55 mm (width) x 35 mm (height)
- several 3mm holes for mounting the unit on a rear panel or bottom plate

Planned for  ca. Oktober 2015 / ~ October 2015 /  for ~ Euro 75.00

Doepfer A-136 Distortion/Waveshaper Tutorial Videos by Raul Pena

Raul Pena published new videos demonstrating the A-136 Distortion/Waveshaper Module

Module A-136 is a distortion and waveshaping module with extensive control possibilities. The incoming audio or cv signal is internally divided into 3 sections:
- positive component of the signal with adjustable clipping level (even externally via jack socket) and positive or negative amplification (+/-) of this component
- negative component of the signal with adjustable clipping level (even externally via jack socket) and positive or negative amplification (+/-) of this component
- original signal with positive or negative amplification (+/-)

Different settings of 5 distortion/waveshaping parameters enable a lot of very complex and extreme waveform modifications. The range of modifications reaches from simple soft or hard clipping to completely altered waveforms where the original signal is no longer recognizable.
The sketch below shows only a few examples when using a triangle as input signal.

Applications: audio distortion (especially in combination with filters very interesting), waveform modification for audio signals as well as for control voltages (LFO, ADSR, random etc.).

Video: Doepfer A136 Distortion/Waveshaper Basics and Demos (Full Playlist)

Doepfer A168-1 PW/PWM-Generator Announced

Doepfer Announced another new module last week...

Module A-168-1 is a pulsewidth modulation generator (PWM Module).
It derives a rectangle signal with adjustable pulsewidth from an external triangle, sawtooth or sine wave. 
The external signal can be an LFO, VCO or any other signal with falling/rising slopes (e.g. ADSR). In addition the pulsewidth can be modulated by a CV signal (e.g. LFO or ADSR). 
The typical application is the generation of a rectangle signal with PWM from VCOs or LFOs which do not yet have this feature (e.g. A-110-4, A-145, A-147-2, A-143-4, A-143-9).

The module is equipped with these controls and in/output:
- Manual PW control (PW)
- PWM CV Input with attenuator (PWM)
- Signal input (In)
- Output with LED control (Out)
- Inverted Output with LED control (/Out)
- Internal trimming potentiometer for PW (is adjusted for symmetrical 50:50 rectangle when the manual PW control is at center position)
- Internal trimming potentiometer for PWM range (is adjusted so that the manual PW control covers the full PW range 0 ... 100%)
- The trimming potentiometers are required to adjust the module for best operation for signals with different DC offsets (e.g. unipolar/bipolar signals) and different signal levels.
Normally the module is assigned to another module because the trimming potentiometer have to be readjusted when the input signal changes (unless the signals have nearly the same DC offset and level)

(planned for November 2015, price ~ Euro 50.00, price and release date are still without obligation)