Noctruen Op9 No2 Question

Hi I got a question about Stretto in this Nocturne and general!



On the picture the stretto is sort of applied to the last two octaves since its written underneath them, so I guess I shouldt think of stretto when I keep on going down with the octaves?? This is at least how Rubinstein does, he only plays those two octaves stretto and continues with steady octaves after that! So I was just wondering what you think, and if also marks/comments like that ends meaning something at the end of the bars like accidentals ect?!

Well, how I was taught this by my teacher years ago is that the stretto is until the end of the phrase, which is usually the case when you have a term marking. I mean if you see a Forte marking under a chord that doesn't generally mean only THAT chord will be forte right?