Classical Greek choruses consisted of a group of actors who delivered lines in unison. Their lines in the play were usually a commentary on the action/plot of the play, and they acted as a stand-in for the audience.
Hi!! Is this a question or just a statement? Sorry, I can answer it in the comments if it's a question but I don't really know if it is !! sorry :D
<span>A key signature is most helpful in determining the "root and the scale used" a piece of music. Other purpose of key signature is that it tells you what key to play in order to avoid accidentals. Accidentals are symbols that modifies the pitch of the note, either making it into a sharp, a flat.</span>
