Saygeronimo57

I have Synthesia and I like to listen to songs on there. Lately, when I listen to a song, the instruments are out of tune. It's not all the time and it's not all the instruments. It's happening with MIDIs and actual songs that are already on there. I've seen a different post about it, but they talk about things like "pitch bending" and "pitchbend wheels" and "ext keyboards". I'm only 11, and I am NOT a pro, so please try to keep it simple. Thanks.