Free Virtual Synth Recreates Casio SK-1

Arman Bohn has released SK-crooner, a free vocal synth for Windows based on the “human voice” of the Casio SK-1.

“I loved this sound when I was growing up,” says Bohn, “very spooky and unnatural.”


  • Two separate modes:
    • Original (modeled after the Casio SK-1)
    • Tone held (for long notes)
  • ADSR Amplitude Envelope
  • Vibrato with Rate and Depth
  • Filter control with Frequency and Resonance
  • Sample Rate and Bit Depth Crush
  • Variable Portamento
  • Master Volume Level
  • Reverb with Size, Depth and Width Control

One thought on “Free Virtual Synth Recreates Casio SK-1

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