Distropolis has released a beta version of SK-crooner - a sample-based recreation of the "human voice" vocal patch from the Casio SK-1.

Features include:

• Two separate modes: Original (modeled after the Casio SK-1) and 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, Mix and Width Control.

SK-crooner is available as a VST instrument for Windows and it is free.