The present disclosure provides a digital sound projector including a first flat speaker, a second flat speaker, a connecting device and a signal input device. The connecting device pivotally connects the first flat speaker and the second flat speaker to form an angle between a surface of the first flat speaker and a surface of the second flat speaker. The angle is larger than 0 degrees and smaller than 180 degrees. The signal input device inputs electrical signals to each of the first and the second flat speakers.