Note: You can not use the Microphone reverb function when using the Stereo Mix. USB sound is and USB audio controller. It supports 32KBz, 44.1khz. (which two need driver or application software support) and 48Khz sampling rate in digital recording, 48KHz sampling in digitalnalog audio playback. In digital playback mode, it receives audio stream from PC via USB interface and transmits audio data according to the AESEBU, IEC60958, SPDIF consumer interface standards. Only R L channel PCM audio in 5.1 channel can be conveyed in digital playback In digital recording mode, it receives SPDIF digital audio input and sends back to PC through USB. Three sampling rates, includes 32KHz,44.1KHz are automatically locked internally. In analog recording mode, a fixed 48KHz sampling rate is supported by analog audio recording. OS support: LINUX / win98 / XP / 2000 / Vista / Win7 / Win 10 / LINUX / OS 9.1 ( version support two channel playback only). If you want the fiber output to support 5.1-channel output, you must have the following conditions:1.The must be DTS 5.1 channels, such as 3D games, HD . If it is a general MP3 or general 2-channel video, you can only have 2-channel effect. The player settings are important: if it is set up with PowerDVD software from the fiber output "Passthrough" through. Meaning that the sound card is only responsible for the fiber signal output, not decoding. Dispensers strongly recommend KMP this player, the function is very powerful.3. After the fiber output must be AC3 / DTS decoder, or built-in AC3 / DTS decoder amplifier and the like. Compare with similar items. Color: Blue Material: ABS Package Contents: 1 * External Sound Card 1 * USB Cable 1 * CD Driver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.