The Korg VIF3 is an expansion board package for the PA-80 arranger keyboard consisting of the VHG1 vocal and guitar processor board, and the VIFI PAL and NTSC video interface cards.
The VHG1 will add four part harmonies to an original vocal part in vocal processor mode. In the guitar mode, it offers a variety of multi-effect set-ups, which are all user editable.
The VIF1 video interface board is used when playing back SMF (Standard MIDI Files) that feature lyrics, and allows for Karaoke-style display, complete with user-selectable lyric and background color, on any TV or monitor with composite video inputs.