Unknown 64 is a synth plugin crafted to capture the distinctive sound character of the Commodore 64. It focuses on delivering nostalgic tones reminiscent of classic 8-bit gaming and retro computer music by utilizing a single oscillator architecture designed for authentic vintage sound reproduction.

The synth includes expressive features such as vibrato and pulse width modulation (PWM) with flexible control through ADSR envelopes or oscillator settings. It offers sound shaping options with low and high band filters, allowing users to sculpt timbres that stay true to the original hardware's sonic palette.

Additional creative tools include an auto panner for spatial movement, a ring modulator for metallic textures, and an arpeggiator equipped with an end step and wavetable functionality. These elements combine to enhance sound design possibilities while maintaining the vintage essence that defines the plugin.