GWC Technology AA1500 5.1 Channel USB Audio Adapter Full-duplex playback/recording audio stream without any requirement of a sound card in PC Provides 1/8" audio connections (the standard size for computers). Will co-exist with sound cards and built in audio. Supports 6 channels for analog playback in the analog playback mode (for 5.1 channel audio) Supports Fixed 48KHz sampling rate in analog recording and playback