I have not been able to find an answer to this question, so I am asking it here. In this piece of music I am trying to play, there is a weird crescendo which looks like this:
So since that doesn't make any sense, let me explain: the right part of it:
is the normal crescendo part, and the left part is some weird thing that I don't understand. Is this just a style of older music, or does it have another meaning?