Beside above, how loud or soft notes are?
Dynamics are relative and do not refer to specific volume levels. Traditionally, dynamic markings are based on Italian words, although there is nothing wrong with simply writing things like “quietly” or “louder” in the music. Forte means loud and piano means soft.
Regarding this, what is a music script?
Musical scripts are structured just the same as one would write a regular feature screenplay — except there are now the additions of musical numbers. It is the placement of the musical numbers that is key.
What size paper is sheet music printed on?
In general, the four major sizes for music are 9 x 12″ (folio size, used for parts and some scores, equivalent to UK/EU paper size C4 which is 9X12. 8), 11 x 17″ (UK/EU A3) or 11 x 14″ UK/EU B4) (scores, and very rarely, parts), and 8.5 x 11″ (roughly equivalent to UK/EU A4) (choral scores/parts).