I know that was very unspecific but here is what I mean. When producing a song (i'm trying to get into electronic), what are important techniques/methods that are crucial to a track. I hear a lot of producers use terms like side chaining , compression , limiting , eqing. After finding out what compression does , I'm wondering if there are any other techniques like those that are pretty crucial to all tracks. That was production wise , but talking about music now , are there also key parts that every song has? for example , every song has :drums , melody , bass , subbass(confused about this a little bit),(can you add to this list?)