The simple answer, based on the example you gave, is reverb. Music, as in live music, as the human ear is used to hearing it is sound waves moving through the air which is affected by the size and shape of the room, what it may or may not be reflecting off of, etc. Even recordings tend to incidentally capture this quality*. Digital music removes this entirely: you're not playing into a microphone or an ear in a room, you're telling a computer what sounds to generate and it's generating them. Which is why however long ago the reverb effect was invented/developed, a way of re-inserting this quality. Learning to use reverb (very doable in Logic, which is what I use) might be your first step.
*Modern professional studio recordings are usually an exception as they tend to try to remove the natural reverb and then add it back in electronically/mechanically later, one of many many ways studio recording is all about controlling every little detail of every little sound.
PS- I agree with Metal, the chances of me reviewing this song under normal circumstances would be zero due to the name you gave it. Cheers!