The Forgotten Keys FK13 is a virtual Korg Mini-Pops 3 / Univox SR-55 analogue drum machine. Also branded as the Aria Diamond in some cases.
The FK13 features isolated multi-samples of each drum sound and re-creations of all the internal rhythm patterns. These patterns can be combined with each other just like the original. The volume, panning, tuning and mute status of each sound can be adjusted, and the MIDI input and audio output routing can be customised. The interface has an authentic layout.