The InLine® AmpUSB 384KHz/32bit DSD USB Audio DAC with Vacuum Tube amplifier is an ultra-mastering grade digital audio playback system. It is capable of converting high resolution PCM audio (up to 384 kHz) and DSD audio (up to 128x DSD). The DAC allows you to bypass your computer's soundcard or headphone output and send digital audio signal through the USB interface. With this perfect digital interface between your computer and the music system, the sound quality is pushed to another higher level in your overall music environment. The amplifier tube provides for a soft and pleasant sound character, the signals are quasi-analog amplified and have a more natural sound. Caution: First please connect and turn on the amplifier, then install the Via driver, afterwards restart your PC.