C-Media CMI8768 8-channel PCI Sound Card C-Media CMI8768 PCI 8-Channel Sound Card General Features: C-Media CMI8768/PCI-8ch Chipset HRTF-based 3D positional audio (C3DX) for 8-CH output PCI Rev. 2.2 compliant with bus mastering modes Microphone echo and Karaoke ascending/descending key effects Plug and Play Built-in 32-ohm earphone buffer