If you have a music collection on your computer you can ask Beat Hazard to scan and find all your music.
Searching For Music From the Main Menu select 'Manage Music' -> 'Find My Music' Select 'Search Computer' and point it at the root folder where your music is. The game will then recursively search through the folders and make a list of all your music.
Note: If you move music about after this, it's best to 'Clear Track List' and re-search.
Note: High scores for each track are saved separately, so it's fine to clear your tracks. Your scores will not be lost.
Browse by Folder You can also browser by folder. From the Main Menu select 'Manage Music' -> 'My Music' Select the far left tab 'Files' and from there you can navigate your hard drive and folder structure.