The DV3000 does not PARSE packets.  You must parse out the AMBE from the stream before you send it to the chipset.  Parsing is not too hard, if you know the data format.  That format is undocumented and proprietary information owned by BigM.  In addition it is obscured by the fact that the audio is interleaved, and FEC is added.  So you can not just extract the bytes you have to undo this encoding.