Good detective work. Those audio problems can be extremely tough to track down. CapnScurvy used to say "when in doubt, emulate Stock". That especially applies to the wav sound files. When adding a new file, find a similar existing use file, and copy it's bit-depth, resolution and channel count, and in the SH.sdl file, set it up as the similar existing set-up is there in the Stock game. Some sounds should not be over five seconds long. Some should not be over 15 seconds long, and others (mostly the "amb" sounds) can be quite long. If you are replacing a sound in an existing mod, it is best to copy the settings used for the file off of a similar use in the Stock game, just in case the original modder did not...
