Yamaha PortaSound PSS-140 - Vintage Keyboard from 1988 - Let's Record it in Loopy Pro with Effects — Audiobus Forum
Yamaha PortaSound PSS-470 | Vintage Synth Explorer
A Yamaha Pss 480 Keyboard, And A Midi Composer Keyboard.
Yamaha PSS-A50 : MIDI Controller - More Possibilities with MIDI Connectivity
Are friends electric' on my cheap 1990 Yamaha Pss, the internal soundbank can manage 16 multitrack composition, 6 tracks used here, including drums. Headphone output recording on single audio track : r/synthesizers
Yamaha PSS-790 MIDI PortaSound Keyboard Original Service Manual, Schematics Book | eBay