Portable Keyboard / 1990
[ Image ] PORTATONE PSR-4500

A Portatone equipped with a Dual Architectural Synthesis System (DASS) tone generator, which effectively and realistically expresses instrument sounds through the combination of FM and AWM tone generators.
With the ability to edit attack, decay, and other parameters, this keyboard is as functional as a synthesizer, and paved the way for the Yamaha Style keyboards to come.