After extraction of the OBB then music_core/additional.pak+sounds_core/additional/pigs/birds (pigs and birds aren't present in Go, only soundscore, musiccore [APK] and musicadditional [OBB] are present) from the XPK2 script, on update v1.36.8 (Latest TF update ABGO 2.8.1), I got a bunch of .XOPUS files as well as a few MP3 files (except for Go, only having .XOPUS files) and they appear to be audio streams due to they are converted to WAV files after starting the game up for the first time or if the snd_pak folder in EXTDATA/gamesig is deleted, not present or doesn't have files. I was hoping someone could help open and play the .XOPUS sound from Angry Birds: Transformers without using the game's automatic conversion and Go alone due to it doesn't have the conversion writing to EXTDATA system. The heading is "XOpu0 È". Any advice? If so thanks .