Software only, no special cards required. Simultaneous MP3/AAC/aacPlus/MP2/WMA encoding, compatible with Shoutcast, Icecast, Wowza and Windows Media servers. Supports multiple ASIO and WDM (Wave/Direct-Sound/Kernel Streaming) audio interfaces simultaneously. Input selection can be done on the fly. Up to 16 fully independent stereo processors in one instance, and up to 8 instances on one machine. Pay only for what you need. Upgrades available. Includes Virtual Audio Cable to receive audio from other programs on the same machine. Undo with De- clipper prevents listener fatigue. 6-band Parametric EQ for creation of a signaturesound. Downward Expansion (source noise reduction). Multiband stereo enhancer. Up to Three-stage AGC with adjustable sidechain filter for consistent levels. 2-7 bands multiband processing for consistent special balance.Final two-band look-ahead limiter for clarity and loudness.