Haydn's Op. 54 No.2 quartet has all the sunny quality you'd expect from C major but enters a very dark place in the middle movements, alongside Brahms' turbulent Op 51 No.1 quartet in C minor. Haydn's Op. 54 No.2 quartet has all the sunny quality you'd expect from C major but enters a very dark place in the middle movements, alongside Brahms' turbulent Op 51 No.1 quartet in C minor.