Hi Xcrossi,
1) Iv'e been using Audacity for years great program very flexible,great for sampling from Youtube.
Because Audacity does not know what asset x is,open Asset X
Look for you wav. right click,open with.>Audacity.
2)Open Audacity,File,import,raw data,browse to your file.
Remember if you choose to associate all wavs with Audacity,all your wavs will display audacity icon,instead of your default windows icon,its annoying.
Edit.
Sorry,didn't know AssetX is an actual program,
Daz