MFB's Synth Pro is an eight-voice polyphonic analog desktop synthesizer with three oscillators and configurable filters. As a further developed, polyphonic successor of the "Synth II", the "Pro" follows its ancestors and conceptually positions itself as an analog synthesizer with three oscillators next to a Minimoog. With two analog filters, effects and flexible modulation assignments you can look forward to a lively sound.
The sound generation is impressive: three almost identically constructed oscillators generate a rich sound foundation. For each oscillator, the waveforms can be continuously crossfaded from sub-oscillator, sawtooth, triangle, rectangle and "extra". Extra refers to pulse, ring modulator and noise. The waveform and the pitch (FM) can be modulated individually manually or with LFO or envelope. Tone generators 2 and 3 can be synchronized to the oscillator above, in tone generator 1 the even more precise DCO control for all three oscillators can be activated.
The basic sound is processed with two analog filters: Filter 1 is an OTA filter and covers as multimode VCF lowpass, bandpass and highpass with 12 dB edge steepness each. The second filter is a 24 dB lowpass filter, which is implemented as a transistor cascade. Both can be used simultaneously, you have the choice of serial or parallel operation. Since even the VCA can be modulated in addition to the envelope, you get exciting sound nuances between light and hard tremolo and sideband modulation. An effects section with delay, reverb, chorus and other effect types completes the sound palette.
Two tempo-syncable LFOs, which provide sawtooth, rectangle, triangle and random waveforms and can be set to one-shot mode, as well as three loopable envelopes (2x ADSR, 1x A-D/R) can be edited extensively via the menu and are assigned to their respective targets in the patch.
The Synth Pro has 240 memory locations (30 banks of 8 sounds each) where sounds can be stored and recalled. The voice mode in the system menu is also interesting. Here you can choose whether the instrument should be polyphonic, in unison, mono, or as a chord with the eight voices. A special highlight, however, is the Rotate mode: when playing monophonic, eight presets can be assigned to the voices, which will alternate with each new note. Since most of the parameters are sent and received via MIDI-CC, the integration into a studio environment where reproducibility is important is easy. The integrated arpeggiator and polyphonic step sequencer are a great addition for working out musical ideas, both live and in the studio.