What "loop files" do you mean? The program only works on PC version WAV files. You don't even need the program anymore because I also created a TXTH (".wav.txth") for that:
This will not work for xbox sounds. The PC sounds are better quality anyway because they're uncompressed. At least the samples you provided.
If you mean the music: the program can't deal with music. I can only try to include loop information in the TXTH or write a separate program if it can't be done using TXTH.
I was referring to the files that are labelled "loop" at the end because not all of them seem to work with your txth file, nor your program. You can download some samples here: https://zenhax.com/download/file.php?id=9861
Update: I used VGMGUI on the files. They work. I was using Foobar.