Cynthia – Free Windows VST That Emulates EMS SynthiA

Cynthia is a free Windows VSTi/VST inspired by the classic EMS Synthi A.

Specifications (like Synthi A):

  • 3 oscillators with controls for shape and level of the waveforms
    • OSC1: Range from 0.6 Hz to 16 kHz, sine and triangle
    • OSC2: Range from 0.6 Hz to 16 kHz, square and triangle
    • OSC3: Range from 0.015 Hz to 500 Hz, square and triangle
  • Noise generator
  • Two audio inputs so you can modify the sound of a guitar or your voice
  • A nasty filter that can go into self-oscillation
  • An attack-hold-decay(-repeat) envelope controlling the volume, and doubling as an envelope generator with a freely assignable output
  • Ring modulator
  • Spring reverb
  • Joystick for extra control
  • Stereo outputs with extra filters, pan and volume control
  • A 16 x 16 routing matrix, where you can connect everything at will
  • 2 pairs of stereo outputs
  • Direct out
  • Speaker (simulating the sound of a pair of canny speakers)

Additional Features in Cynthia:

  • Each OSC can be synced and phase shifted (0-180 degrees) at will.
  • A delay module with delay time in the range 0-0.1 seconds or 1-10 seconds. This allows you to delay not only audio, but also phase shift it or delay control voltages.
  • More advanced modifications of envelope control voltage as you can add bias, invert it and adjust its level independently.
  • Inversion of each individual connection you make in the matrix
  • A simple 8 step control voltage sequencer, that allows you to make a sequence of notes, but also filter frequency, amplification or what ever you feel like.
  • Adjustable portamento time, so you can make nice glides.
  • A build in tuner, so you can tune each OSC by ear.
  • 3 extra matrix rows for the build in CV sequencer, and host MIDI pitch and velocity.
  • A collection of nice presets to get you started (thanks HSkovlund)
  • And of course: MIDI cc’s can be assigned at your command to any knob!

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