A Native Instruments Kontakt 3 Patch of a Square wave that is running through the keyboards internal chorus/reverb, it's a sample but not a one-shot sample since it's a minute long sustain, I made this sample from my Yamaha PSR-E305 Keyboard before I sold it in 2013, it's in Native Instruments Kontakt 3 format because Extreme Sample Converter exports this format and it was sourced from a E-MU Emulator 3X patch I made with the sample that I converted to Kontakt format as well as others, later on I will fix the multi-sample problem that re-sampling and stretching and pitch correction on those stretched out notes.