Vintage Yamaha PSS 270 PortaSound Voice Bank Electronic Keyboard Works Great! | eBay
Yamaha PSS-570 Synthesizer | Reverb
Yamaha PortaSound PSS 470 Key Digital Synthesizer for sale online | eBay
Yamaha PSS list
Yamaha PSS-570 | Reverb
Yamaha Pss-570 | Reverb
Yamaha PSS-570 keyboard demo Part 2 - YouTube
I got a Yamaha PSS-570 & PSS-390 as an Xmas present to myself. The limited parameters of these synths offers freedom from the complexity of crafting FM sounds. Hope you had a