Sometimes the expected works well with photography. Here, the piano keys are the subject. It works well. You can almost get a sense of the music with the movement in the image. Though not played, they play.
Other times, the unexpected can work equally as well. The pedals of the piano are not often the subject of the picture. This image is quieter, not unlike the workers behind the scenes in an organization or office or church group. Though integral to the music, to the whole, the pedals lie quietly in the shadows of the keys.