List of L4D2 Campaign Music

In order that would put music on the map:

1. Open Hammer.
2. Open the Мap.
3. Click to Map tab and then select Maps Properties.
4. Select Music Post-Fix String tab.
5. Enter your value.

List of Music

Campaign	Code of Music
Default	Waterfront
[L4D2] Dead Center	Mall
[L4D2] Dark Carnival	Fairgrounds
[L4D2] Swamp Fever	Plankcountry
[L4D2] Hard Rain	Milltown
[L4D2] The Parish	BigEasy