Audio Codec Needed ,I think !!!!!!

XviD-TDKeD2k < — — — Thats the extension of the file, well sorry not the extension the extension is .avi but Im guessing the 'TDKED2K' is some form of filter or codec, Im really not sure and Iv downloaded abt 4 gigs of A really cool cartoon, so I would really appreciate any help, you see I can play the video in DivX player or Media Player but there’s no Audio, Also I can play both audio and video on Mplayer, but the thing is ,if I burn it onto a CD will it play on the DivX/DVD player on my computer, Ill really appreciate a wuick response...thanks a MIllion !