This work aims to describe the Segment synthesizer, its development process, cover a description of the original Segment Synthesis and its properties, advantages and limitations. It will also clarify the way the hardware controls and the user interface were designed, Segment's connectivity and its audio features. It will also cover the accompanying set of software features -- the software and the cloud and will explain what licencing was chosen and why. It will also briefly cover the tools used to develop the product.