Options for capturing compressed audio directly are more limited. If your source playback device allows you to output uncompressed multichannel PCM and you don't mind recompressing, the cheapest option I'm aware of allowing more than 2 channels is the BlackMagic Decklink Mini Recorder card paired with an HDCP stripper (as of Sept '13).
(Almost) none of these cards will record more than 2 channels of audio.How to capture HDCP-encrypted HDMI sources (Vudu, Netflix, Directv, Virgin Media, etc.) Author drngr Date, 3:38 PM Author drngr Time 3:38 PM (Edited) Post link How to capture HDCP-encrypted HDMI sources (Vudu, Netflix, Directv, Virgin Media, etc.) - Original Trilogy logo Sign In