At the 2016 NAMM Show, Social Entropy showed updates to its Engine hardware sequencer, and also introduced its new control voltage expansion board.
Here’s a video overview of the Engine sequencer from the NAMM Show floor, by designer John Kimble.
Social Entropy is known for their drop-in CPU mods that bring updated sequencing capabilities to the Roland 303 bassline synthesizer and the Roland 606 drum machine.
Engine is multitrack hardware sequencer, that builds on their experience with 303/606 sequencing, and is designed for creating both melodic and percussion patterns in a compact tabletop unit.
The Engine sequencer is priced at US $665. For more info, see the Social Entropy site.