Source a modded Yamaha PSR-E304 Preset layered with another string preset both detuned. Yamaha PSR and YPT Keyboards are general midi with XG Sounds I used one XG String preset and another GM Sound which both were detuned and transposed -12 semitones and it does sound different, despite what people say you can sample instruments that are modded in PSR keyboards if you use the menu settings.