Proposed is a digital sound system most suitable for a digital speaker device for directly converting analog sound by a circuit using a ӣ modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. Provided is a digital speaker driving device characterized in that the device is constituted of a ӣ modulator, a post filter, s driving circuits, and a power supply circuit for supplying power to the ӣ modulator, the post filter and the s driving elements and that the s driving circuits are adapted to s digital signal terminals.