Supply music

I need some professional music supplied - around 20 or 30 minutes of unique, professional, corporate, soft music with no voices. No heavy metal! We want professional music (you must be licensed to sell it or produce it yourself) that we can play in the background during a company corporate presentation day. Must be in standard format playable by Windows Media Player or similar. No milestones released until all music supplied and we've checked and approved it. Ideally provide short sample of music with bid.