The musical side involves how a certain emotion or atmosphere can be created by a composer. Scenes such as the crane scene (pictured below) has an african soundtrack playing, to show the culture and location.
The dialogue in the poker scene (pictured below) is produced so that even though a character may be whispering they are clearly heard by the viewers, even though they may be inaudible to other characters.
The sound effects in this are added after the scene has been filmed, sometimes weeks later. For example, when Bond (pictured below) fires a gun, the sound of the gun is recorded elsewhere and a sound editor adds this in later. Other effects can include footsteps, breaking glass and explosions.