Samplescience has released the free instrument Toy Keyboard with a sample library of sounds of the Yamaha PSR-78 home keyboard.
“Toy Keyboard is a free VST/AU plugin instrument and sample library featuring the sound of the Yamaha PSR-78 home keyboard. All the sound have been sampled and looped when appropriate. To keep the plugin light, each sound contains only one sample stretched over the keyboard. The C3 note has been sampled for each sound, but in some cases you’ll hear a different note (C1 or C2). To respect the original mapping of the PSR-78, I decided to keep the C1 and C2 notes to C3. The labeled and looped wav files are also available.”