Sheet music

When you see the "arranged by" attribution on a score, what did the arranger (typically) do?

I know there is a quarter tone notation, but is there a symbol for music score that will simply say over/under pitch? I think quarter tone notation might be too strict/rigid in music arrangement... more

How can you tell what key a melody is in if it uses notes found in multiple scales? And if a note is introduced from a different scale than the one it was in, does that change the key? What if it... more

When you see the "arranged by" attribution on a score, what did the arranger (typically) do?

What open source softwares are available for creating a music score? I have Logic X but I don't think it's geared well for that kind of thing.

I am searching for the piano sheet music of the Russian revolutionary song "Polyushka Pole" or "Poliyushka Pole". I found a sheet music for the violin but not for the piano. I am also searching for... more