MATRIXSYNTH: Doepfer A-106-6 XP Filter Overview (LMS Eurorack Expansion Project)

Thursday, November 16, 2017

Doepfer A-106-6 XP Filter Overview (LMS Eurorack Expansion Project)


Published on Nov 16, 2017 Learning Modular

"I created a set of four movies on the Doepfer A-106-6 XP Filter, which was inspired by the filter in the Oberheim Xpander. Anyone who is curious about the sound of different filter modes or numbers of poles, or the difference between filters that self-oscillates versus one that doesn’t, will probably find these movies interesting as I really dive into the sound and characteristic of this flexible Curtis-based filter module.

As usual, my Patreon subscribers (https://www.patreon.com/LearningModular) get additional posts with details.
For more on the Learning Modular Synthesis Eurorack Expansion Project for those exploring what module to add to their system next, visit http://learningmodular.com/eurorack-e.... These movies will be added to the version of my “Eurorack Expansion” course available through the Learning Modular web site: https://learningmodular.com/register/..."

Playlist details:

1. Doepfer A-106-6 XP Filter 1/4: overview (LMS Eurorack Expansion Project)

"This is the first of four movies on the Doepfer A-106-6 XP Filter, which was inspired by the filter in the Oberheim Xpander. It gives an overview of this filters, including connections & controls, input level & overdriving, frequency modulation of the cutoff, and enveloping the resonance. The video breaks down like this:

0:00 introduction
1:00 multiple outputs
1:34 audio in & level
1:57 cutoff CV including FM
3:13 resonance including enveloping
6:20 Filter Groups"

2. Doepfer A-106-6 XP Filter 2/4: LP, BP, & resonance (LMS Eurorack Expansion Project)

"This is the second of four movies on the Doepfer A-106-6 XP Filter, which was inspired by the filter in the Oberheim Xpander. It goes through each of the low pass and high pass modes available. In between, it goes into a lot of detail about this filter’s resonance characteristics, including how half of the modes are capable of self-oscillation, and that these are the less stable of the modes during slow sweeps. The video breaks down like this:

0:00 introduction
1:40 low pass modes
2:41 resonance
5:45 noise & LP modes
6:41 high pass modes"

3. Doepfer A-106-6 XP Filter 4/4: notch & all pass modes (LMS Eurorack Expansion Project)

"This is the fourth and final of four movies on the Doepfer A-106-6 XP Filter, which was inspired by the filter in the Oberheim Xpander. This movie goes through its four variations on the notch and “all pass” modes. In addition to tailoring the frequency response of the audio going through it, the all pass modes in particular can be used for phase shifter effects. The video breaks down like this:

0:00 introduction
0:26 2-pole notch mode
1:42 2-pole notch + 1 pole low pass
2:25 modulation examples
4:08 3-pole all pass mode
5:07 3-pole all pass + 1 pole low pass
5:49 using as a phase shifter"

4. Doepfer A-106-6 XP Filter 3/4: bandpass variations (LMS Eurorack Expansion Project)

"This is the third of four movies on the Doepfer A-106-6 XP Filter, which was inspired by the filter in the Oberheim Xpander. It goes through the numerous bandpass modes, including the “asymmetrical” ones that have more poles on one side of the band than the other. The video breaks down like this:

0:00 introduction
0:44 symmetric bandpass modes
2:08 asymmetric bandpass modes
3:55 more on resonance
4:56 review of the different modes"

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