YAMAHA PSR-420/PSR-320 user manual

The Yamaha PSR-320/420 PortaTone electronic keyboard is a product that combines advanced AWM tone generation technology with state-of-the-art digital electronics, offering stunning sound quality and extensive features. It features 128 voices with eight percussion kits, 100 accompaniment styles, advanced auto-accompaniment technology, a large multi-function LCD display panel, and more.