LMMS: free, open source music sequencer & multitracker - Freewaregenius.com
How to load/import samples in LMMS - YouTube
Compose music with your PC: LMMS – Musica Informatica
These .wav files won't produce any sound in LMMS. They work fine when I play them in the Media Player and other .wav files are completely fine, it's just this sample pack.