> As a concrete example: ever since I was a child, I've heard people speak of major and minor triads as sounding happy or sad. That seems like something that's

> As a concrete example: ever since I was a child, I've heard people speak of major and minor triads as sounding happy or sad. That seems like something that's just obvious to a lot of people. It's never been obvious to me I completely agree. It's not very difficult to string together minor chords in a way that sounds happy, and descending major chords can easily sound sad. If you just play a major or minor chord, I don't associate it with much of anything happy or sad.