Yamaha PSS-390 PortaSound 80s FM Synthesizer WorkstationYamaha PSS 390 PortaSound Part of the very successful PortaSound line of musical keyboards, the PSS 390 is a 2 operator FM keyboard workstation. Adorable in size and incredibly 80s in both look and sound, the PSS 390 features 100 sounds as well as 100 built in rhythm tracks to allow you to design, layer and record entire songs right inside the keyboard. It features a fully customizable digital synthesizer section that allows full control over