Korean developer Nexon is inviting users to create original songs with MusicShake’s online program and contribute them to Audition, its MMO dancing game.

Based in South Korea, MusicShake offers user-generated music tools to the general public. Users can sign onto MusicShake and combine their choice of instrument modules from a list of thousands. They can also add their own vocals to their tracks. Audition’s community will vote on their favorite tracks, and the top songs will be featured in the game.

Nexon is giving away Nexon cash, its virtual currency for Nexon network titles (e.g. MapleStory), as prizes to promote the competition. Entries must be submitted by May 14, 2008.