As everyone has said, the best way to learn how to read music is by learning an instrument.
When you're part of a production that has music involved, a copy of the score/sheet music should be available. If you don't really know how to read music, try and get the copy with Vocals. 99% of the time, there will be lyrics below the top line (Treble) of music.
Each mark on the page has a meaning. There are various different notes etc. The easiest way to learn what each note (sound) on the page makes is by learning your scales and the musical alphabet which only contains 8 letters (A B C D E F G). For example: the Treble clef (looks similar to an '&') each line and space has its own Letter. Starting from the bottom line of the stave, the lines have a letter associated to them. The lines are E G B D F. The best way to remember this is Elephants Go Bonkers Drinking Fanta. The letters of the spaces are F A C E.
Music theory is something that will take you a long time to get your head around. You should be able to find various tutorials on YouTube. This one is very basic but it should get you started in understanding what notes are what. newbielink:https://www.youtube.com/watch?v=leIpJWeWYfA [nonactive]