In addition to USB, the EZbus offers two ways to bring audio digitally into a computer system equipped with a PCI-based audio interface: via S/PDIF and via ADAT light pipe. Simply connect one of the S/PDIF outputs to an S/PDIF-equipped PCI card, or the ADAT optical output to the ADAT optical input on a Lightpipe-equipped PCI card. You can use the ADAT, S/PDIF, USB, and analog outputs simultaneously. (Note: Contact the manufacturer of the PCI card of your choice to verify its compatibility with your computer. We recommend the Event EZ8 Optical Audio Interface, naturally.)