Arcade Chip Voice
A Voltage Controlled Square Wave Oscillator
A Super Low Frequency Oscillator (a fancy term for LFO)
A VCA-like 'modulator'
A Sweepable Digital Noise Generator (shift register based)
A Filter for the Digital Noise Generator
An Envelope Generator (Attack/Decay)
A programmable Mixer
http://www.birthofasynth.com/Thomas_Henry/Pages/SN-Voice_main.html
Module is available as a DIY project only.
No info about availability.
$299