Behringer Model D

3 VCO fat synth (2018)

Budget copy of cult monophonic synth Moog Minimoog by Bob Bob

Overview

OVERVIEW module SMD reprodution of classic iconic Moog Minimoog , still monophonic but can be Polychained with more units.
Of course the keyboard and rich wood features has gone, but we're talking about a low cost (tiny) module which tries to keep price as low as possible. Light weight with metal case (can be eurorack mounted for a mere 70 HP) .

Terminal connectors:

- Midi Interface (front)
- main out (low/hight)
- power switch
- PSU VDC center positive
- diwpswitch for setting Midi channel

Sound

OSCILLATORS 3 -VCO structures with 6 shapes (triangle, saw tooth, ramp and 3 pulse for osc 1 and osc 2, whereas osc 3 replaces the saw tooth with a reversed one) at 5 different footage height ( LO, 32', 16', 8', 4', and 2') - The third osc can be used as an LFO like the original - also the standard white/pink noise generator.

LFO like the 2016 minimoog reissue, the Model D "boog" has a dedicated LFO (you can still use the LFO3 at the same time) with triangle and pulse shape that can be send by midi CC1 as it lacks a modulation wheel.

ENVELOPE 2 ADS(D) for VCA and VCF. Glide option

FILTER 24dB/Oct resonant multimode with Low Pass o High Pass.
External source can be filtered (line impedance)

MIDI implementation is rather poor with basic Midi commands like note and modulation. Some Sysex but seems to be beta for now, maybe a future update by USB.

Calibration and tuning

CALIBRATION Switch on and wait 15 minutes for tuning... and hope. I had to do oscillator tuning calibration a couple of time.
Well, ok it's analog, but we are in another century.
PROCEDURE FROM MANUAL: The MODEL D synthesizer can be calibrated and checked occasionally to ensure

that it is operating at peak perfomance. Analog circuitry can drift off with time and temperature, and as components age. The main printed circuit board (PCB) of the MODEL D has various test points and miniature potentiometers (trimpots) that allow the various calibration and

adjustment procedures to be carried out. This involves lifting up the front panel to allow access to the bottom side of the PCB.

Three main calibrations can be carried out:

1. The PITCH CV can be calibrated using a computer to send a SysEx command,

an external keyboard, and a digital DC voltmeter. See section 5.2

2. The oscillators can be calibrated using the internally-generated A-440

concert pitch, and an external keyboard

Model D calibration pain