MFB SYNTH Pro Operation Manual page 3

The signals of the three VCOs reach the 12 dB multifilter VCF1 as well as the 24 dB low
pass filter VCF2 via the level controls. When the Para/Ser LED is lit, the signals go first
to VCF1 and then to VCF2.
With the button LP/BP/HP the mode of VCF1 can be set.
The frequency can be changed with cutoff. If the Global Cutoff LED is off, VCF2 cutoff
controls both filters. Cutoff of VCF1 remains active.
With Mod VCF the frequency of the VCF can be modulated with different sources.
With the Contour control the influence of the envelope on the filter frequency can be
determined. The default is ADSR2 for VCF1 and VCF2.
With the key button you can select in four steps (0%, 25%, 50%, 100%) how much the
filter frequency depends on the keyboard.
With the Resonance control, the quality of the filter can be set to self-oscillation.
The Stereo button changes the basic width of the stereo signal in three steps.
The VCF Mix knob blends between both filters.
From the filters, the signals go to the voltage-controlled amplifiers (VCA) whose course is
determined by the envelope, usually ADSR1.
With Mod VCA the volume of the VCA can be modulated with different sources.
From the VCA's, the signal passes directly or via the effects chip to the master control,
depending on the mix control. With Para1, Para2 and Para3 different settings of the
effect can be changed. With the Type button you can switch between reverb, echo, chorus
and extra. Then the signal goes to the output via the master controller.
Preset and user memory
The MFB SYNTH Pro has 240 presets. The selection is made by pressing Preset (LED
lit) and then a number key 1-8. Optionally you can select the bank from 01 ... 30 with the
Value knob. If Preset is pressed a second time (Preset 0), all the pots are active, otherwise
the pots and switches get the stored values. These can be changed by turning (clearly) or
pressing a button on a potentiometer. A preset can be saved by first pressing Store, then
Preset and lastly a number key or bank dialing.
Sequencer
The MFB SYNTH Pro has 240 sequencer memories. The selection is made by pressing
Sequence (LED lit) and then a number key 1-8. Optionally, the Bank can be selected with
the Value knob.
To record a sequence first press Seq and then Record. Now you can enter up to 16 x keys
monophonic or polyphonic on a keyboard. If you want to pause, press Rest. If you want to
record less than 16 steps, stop recording by pressing Record. With Play you can now listen
to the sequence.
A sequence can be saved by first pressing Store, then Sequence and finally a number key.
Arpeggiator
The MFB-SYNTH Pro also has an arpeggiator, which allows you to solve it by playing a
chord this in single tones. The play direction is Up, Down and Up/Down. The modes are