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Showing posts from February, 2015

Doepfer A-106-5 12dB SEM Filter Tutorial Videos by Raul Pena

While I was gone, Raul Pena kept on making new A-100 video tutorials.
Here's the next series (now presented here as a playlist instead of weekly updating a blogpost), showing you all the ins and outs of the A-106-5 SEM Filter.
Module A-106-5 is a 12dB multimode filter that is based on the filter circuit of the Oberheim SEM module.
The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal.  If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates.  The module does not feature self oscillation in contrast to most of the other filters of the A-100 system.  The module generates a distorted audio signal if the level control is set to about 50% (i.e. center position) or more with A-100 standard signals like VCOs.

Inputs:
Audio In, CV1 In without attenuator, CV2 In with Po…

QuBit Electronix Nano Rand

Qu-Bit Electronix has published more info and a video about their latest module, the Nano Rand.

"Nano Rand is a sample and hold, noise source, and random voltage generator in 4 HP.
It takes inspiration from and improves upon the analog concept of a random voltage module; moving forward in leaps and bounds into the digital domain.
At its­ core is an 8 bit microcontroller which allows for an extremely versatile, and more importantly, musical type of random.

- 4 switchable random voltage algorithms
- Can be internally or externally clocked
- Random gate source that generates musical derivatives of incoming clock
- Generates random frequency audio rate square waves allowing it to be both audio and control source
- Random voltage can be unipolar or bipolar

Specifications:
Width: 4hp
38.1mm (Skiff friendly)
Power: 60mA
Price: $190.00"

Video: Nano Rand Tutorial

" This is a tutorial for the Qu-Bit Electronix Nano Rand.

Table of Contents
Introduction: 0:00
Rate and Range: 0:1…