The most discordant interval is arguably the minor 2nd ... a semitone above (D). The open E might make a nice addition, but ...

Here are five chord shapes you need to learn ... It’s well worth having a fingering for the V chord (D) of the key of G up ...

and at that moment a chord rings out: it fixes something essential about the piece, the composer, and the era, in one blazing moment. It feels like Beethoven’s great call to revolution. He’d ...