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.
In the video below, Social Entropy’s John Kimble discusses the architecture of Engine and then demos making a basic song pattern, using various sequencer options:
Engine will be available in early 2015, with an expected price around US $700. See the Social Entropy site for more information.