When performances for A level are marked, they take the raw score and alter it for the standard of the piece. AS pieces have so many marks subtracted if they are below grade 5, or so many marks added if they are grade 6+ (classed as "more difficult", "standard" or "easy"). A2 performance requires you to play a piece which is at least grade 6, and grade 5 pieces have marks taken off for being too easy.
this is very true and is something i would be thinking about if i was you. When taking your a-levels you need to create a balance between course being neccessary/fun/beneficial in context to the dgree you want to do.
for example, if you dont want to do music at uni and youd be more likely to get a better grade doind a different subject (subequently gaining more ucas points) youd probably be better doing that course.
however, if you have the option of doing 4 AS levels, take music on as your fourth and see how thing progress. as mentioned earlier there are no specific entry quals to AS so you may aswell go for it. just make sure you dont waste an A-level, you nee three strong subjects (generally). At this poiny in your education you dont want to start regretting your decisions unless you've thought about them long and hard. Music A-levels is one of the hardest ones to do (in my opinion). Anyway, however, if you would like to do music at uni A-level music is a neccessary A-level.
try using the neccessary/fun/beneficial systemto work out your a-levels. i ended up with
Neccessary - Music
Fun - Philosophy and Ethics
Beneficial - Psychology
*Fun - Drama
hope things go well!