I am playing a piece with nice slured phrases, but I can't slur to high notes without making it sound awful, I've tried sluring in 3rd and increasing to 4ths then 5ths etc, but in the piece I can't slur in higher octaves with out either, splitting the note, the note not coming out or just making some kind of wierd sound which definately isn't top G. And its really annoying me now. What can I do?