Dreaming about playing a flute may symbolize communication, or the need to express oneself. You may want to find a new way of communicating what you want or need.
If you are playing the flute, then it may mean that you need to use your skills of artistry and creativity to provide some healing, cheer up, or help an individual in need.
If you are hearing a flute sound in a dream, this could signify that someone is trying to communicate with you through the spirit world and needs your attention.
It also has sexual connotations about how the flute is blown into, so if you see a flute in your dream and it is being played, this may be an indication that there is some form of sexual arousal occurring.