MFB Snare-522 User manual

General
The module Snare-522 is basically composed of the circuit of the MFB-522 Snare Drum but
its sound can be wider edited. Beyond that, the module allows a control of the four sound
parameters Snappy, Snappy Decay, Tune and Tone through the CV signals like envelope
curves, LFOs and Step Sequencers.
Operation
The type and the electricity supply of the module Snare-522 is compatible with the Doepfer A-
100 modular system. The ten-pin MFB connection cable is connected with the 16 pin jack of
the MIDI/CV board or the Doepfer bus-board. The supply voltage has to total up to +/- 12
volt. A 5 volt voltage is not necessary. The wattage is +/- 30 mA. The module width amounts
to 8 HP = 40 mm.
Attention: You have to make sure that there is the correct politary! The coloured wire of the
ribbon cable has to look down, that means the cable is not allowed to be twisted.
Functions
The Snare Drum is actuated by the In jack. There can be used an analogue or a digital gate
signal of a step sequencer, MIDI-CV/Gate tranformer or a square wave LFO. There can be
used drum pads, piezos or dynamic microphones alternatively. Dynamic trigger affect pitch
and decay next to the attack and volume. With the help of the trim regulator Sens are you able
to adjust the input sensibilty to the trigger signal. The highest trigger voltage should be not
more than 0,1 volt. The input reacts to the positive edge of the trigger signal. The audio signal
is taken from the jack Out and will be carried to a mixer, (DRUM -99 for example), VCA or
any other sound editing modules. This output can be connected directly to a mixer or an audio
interface.
Soundparameter
The Snare-Drum-sound contains three elements: Two band-pass filter (t-brigde filter) who get
into selfoscillation after recieving a trigger impuls and filtered white noise.
The filters frequency will be adjusted with the pot Tune. The frequency can be controlled with
any CV signal through the input Tune. The pot works as an attenuator in this case.
Snappy controls the amount of the noise floor. This can be modulated via Snappy - CV input,
in this mode the regulator works as attentuator too. Zero Volt means no hearable noise!
S.Decay sets the release time of the noise part up to two seconds. The CV In Snap let control
the time via CV, the regulator works as attentuator as well.
Ton let you mix the relation between filter one and filter two. CV In Ton let you modulate the
mix of them two.
Decay sets the main release time of the snares tonal part.
Note: The required voltage for all CV-inputs needs to be within a range of 0 to 5 volts.
The module offers the new developed M-Bus connector whats mean you can you control
everything via Midi/CV interface or our SEQ-01 Pro drumsequencer without additional
patching. Modules get connected serial, M-Bus to first modul, first modul to second modul
and so far .. Following adresses are supported:
Trigger MIDI Note #38 oder #40, depend to the jumpers position, with velocity.
MIDI CCs for
Tune = 18
Noise = 26
Decay = 34
Ton = 42
Noise Decay = 58
Controllers getting ignored if another snare module is triggered. For snare drum modules Midi
Notes #31, #32, #38 und #40 are reserved. Once the Snare-522 reserved trigger appears again
the module reacts to CC again.
Note: The value of controller will be added to the pots.

Owners Manual
Module Snare 522