To dream that you are playing a piano expresses your desire and yearning for a harmonious life.
Where the piano is located hints at the part of your life that needs to be tuned.
To hear the sound of the piano in your dream suggests accord. You are content with the results in your life.
To dream of an out-of-tune piano denotes some difficulties in life. You need to focus on your problems. You need to mend broken relationships and devote more time to your family obligations, relationships, and tasks
To dream of a zither indicates that there is a creative but simple solution to a current problem.
Dreaming that you are playing the instrument to a rapt audience implies that you will discover the solution very soon and that the outcome will be rewarding and satisfying.
Someone else making the music in your dream suggests that you may have to wait awhile for the answer to your problem to become clear.
To dream of a keyboard may be suggesting that too much energy is being put into the internet at this time.
A dream of great joy in direct relation to a keyboard could mean that there is benefit to be found in a career connected to words or writing.