Nowadays, the sound system based on the PC have become a standard not only for music production but also for the DJ performance. In addition, due to the new genre called 'PC Audio', the USB technology is getting much attention of audiophiles. 'd+USB series' is the high quality USB cable for the next-gen sound tools such as digital DJ gears which is boosting its share in the scene, USB audio I/O and USB DAC. Under the digital audio environment, it provides all users beyond the wall between artists and listeners the direct sound reproduction.