From the manufacturer's website: "Replay A/V is the only software that combines Stream Capture, Audio Recording and an Enhanced Podcast Client in one easy-to-use interface."

The most important feature: "Stream Capture lets you save the bits and bytes of streaming audio and video directly from the internet. Replay A/V is the only software that supports Windows Media, Real, Flash, QuickTime and Shoutcast streams. The benefits of this technology are enormous - you can capture multiple streams simultaneously (10 or more is doable with most broadband connections), and you get perfect reproduction at the smallest possible size. Plus, unlike other audio capture programs, no background noises creep into your recordings, and the sound card remains free for normal use."