OK, got it. Unpack the .awb with the program given by hcs in this thread (just drag the .awb into the .exe). You'll get a bunch of .bins, which are audio files in HCA format. You can then decompress these using HCA2WAV, which can be found near the bottom of this page (you can edit the example.bat to target your file). Funnily enough, when I saw it I remembered that I had already found it before for someone else trying to convert HCA files 
Unfortunately though, you can't convert multiple files with HCA2WAV, which will probably become tedious since there are a lot of files in the .awb you gave me (and probably even more in the other two). If you like I could probably make a wrapper for it to convert multiple files (or possibly, add it to VGSC).
Unfortunately though, you can't convert multiple files with HCA2WAV, which will probably become tedious since there are a lot of files in the .awb you gave me (and probably even more in the other two). If you like I could probably make a wrapper for it to convert multiple files (or possibly, add it to VGSC).