The importance of music

Music in video games is what drives the internal motives of excitement and the sense of adventure in a player. In everyday life people run to upbeat tempos to keep pace, they calm down listening to instrumentals and even feel a variety of emotions through the music as they share it with other people. The sound can affect the players performance. In the case of dark and mysterious games, a lurking melody can draw out the anxiety in a player and lead to a better surprise when the music stops and a spooky chime is drawn. These sounds bring a sense of reality to the game, and they shouldn't be overlooked.
Also, with music, there is a reflection of the game type. Certainly you wouldn't want to play 8bit music to something like Fallout- lol Annette, thinking of you. Simply because it doesn't suite the context of the situation. As a designer, you're trying to create an environment wether it's a melody or just the normal sounds you'd hear if you were in the situation. There are even games that don't play melodies, such as Golden Eye N64. It was pretty quiet at times, and the only sounds you'd hear the the footsteps and the echos of the surrounding nature. Then there was rapid gun fire, and the adrenaline kicked in.
Sound, whether it is there or whether it is used scarcely, is just one more way to mold the player's experience. Sets up the atmosphere for the player to dive into and tells them, subconsciously  what to expect. Just like the past reading explained how visual cues show the player where to go and what to do, the sound used (or lack of) will set up expectations in the player themselves and is a whole new way to influence game play.