Let's say you have a loop called "Zeldas Lullaby", and you want to put in the missing apostrophe. The game won't let you select the loop if you do so. In order to have apostrophes in music names, you need to edit your music list.
1. Locate $Music__Zeldas_Lullaby = 1; in Blockland\config\server\musicList.cs
2. Put APOS where an apostrophe belongs (ZeldaAPOSs_Lullaby) and save the file
3. Locate Zeldas_Lullaby.ogg in Blockland\Add-Ons\Music
4. Put the apostrophe in the music filename (Zelda's_Lullaby.ogg)
After following these steps, Blockland will let you enable the apostrophe-incorporating loop. If the loop in question was not installed previously:
1. Put $Music__filename = 1; into musicList.cs, where filename is the loop's name (you should place the line where it'll be in alphabetical order with the rest)
2. Install the loop