Support AES / EBU, IEC60958, S / PDIF; hardware support 7.1 5.1 channel , up to 48KHz sampling rate; Support Win98 / ME / 2000 / XP / MAC OS9.1 (MAC can only use 2 channels); Support full-duplex audio playback and recording of PC silent card; Compatible with USB 1.1 Compatible with audio eq..