More information to the research:
The audio designer for “Need for Speed” is Charles Deenen. He is a is a Dutch computer/video game audio director, music composer, sound designer, and mixer.
There have been many sounds methods tried out to enhance the player experience to provide emotion with sound. The audio has to work together with the experience and the person playing it shouldn’t notice the sound separately. If the consumer notices audio, it starts to work against the game experience.
Researching on ambient production tips and how to create music
Looking through ambient music for inspiration