Sienoc USB 2.0 Virtual 7.1 Channel Audio Xear 3D Sound Card for Windows XP Win 7 Win 8 Linux Vista Mac OS The USB 2.1Channel (Virtual 7.1) sound adapter is a highly flexible audio interface which can be used either with Desktop or Notebook systems. Bundled with Xear 3D sound simulation software, it turns your stereo speaker or earphones into 2.1 channel environment (Virtual 7.1 effect). No drivers required, just plug and play for instant audio playback, also compatible with all major operation systems.