I'm looking for a reasonably priced device which can convert the audio in an HDMI connection while preserving the video. For the audio conversion, I need Dolby-encoded surround sound, at least 5.1 channels, converted to LPCM. So the HDMI input would be video + Dolby surround sound, and the HDMI output would be video + multi-channel LPCM. The use case is so I can use an HDMI video capture card that can capture multiple-channel audio, but only in LPCM format. Does anyone know of a device that can do this, either as it's main function, or perhaps as a side-effect of other functions it has?