1. you only need the CfgMusic-part from the description.ext (guess you know that) - the "blink182"-thing is the name displayed at trigger/effects/music
2. you have to make an folder "music" in your missions folder
3. you have to name your file "music.ogg" and put it into the "music"-folder
4. not sure, but i think it wonÂ't work without the "stringtable.csv"-file (even if it does nothing"
5. good luck (it took myself a whole day to figure out how it works)
(by the way: it works for me, so you can put this dedect-mini-test-mission in ur user/missions-folder, put your musicfile in its "music"-folder, rename the musicfile to "music.ogg" and preview the mission in the editor ...)