To dream that you are writing some kind of the music, shows the creative aspects of your personality. Try to look at the style of the music you were writing or the lyrics youve been using.
Dream dictionary: Music, writing dream meanings
If you are writing some kind of the music, it means that you are trying to express your creativity through your dreams. The dreams suggests to go on.
…over one’s enemy. If one finds his tongue tied in a dream, it means stagnation of his business, or it could mean poverty. If black hair grows over one’s tongue in a dream, it means a fast coming evil. If gray hair grows over one’s tongue in a dream, then it means a slow coming adversity. Hair growing over one’s tongue in a dream also means writing or reciting a poem. One’s tongue in a dream also represents the perfect alibi, the beauty and eloquence of one’s presentation, a professional presentation, good fame and good conduct. If a governor’s tongue is cut off in a dream, it means the death of his interpreter or his speech writer. The human tongue in a dream also represents his pen and his signing authority. If one’s tongue becomes long and reaches the skies in a dream, it means that he will be impeached…