What’s great about this short scene is that like all of Star Wars’s best moments, it’s quiet and it gets you to pay attention. The secret plotting of Darth Sidious with his apprentice lets you know that everything the modern Sith had been planning for 2000 years was about to go into action. At this point, they are forced to remain in secret: both Maul and Sidious, masquerading as a mild-mannered Senator from Naboo, are covered in cloaks and meeting at night on a dark balcony. They don’t even look at each other while speaking. But not for much longer. Maul is anxious to let the Jedi know the Sith are back in town and as a showy character in both appearance and action, he certainly accomplishes that later on in the film. But Maul’s theatrics serve as a cover for his master, who remains hidden among the good guys for another couple of films.
There’s no score in this scene but there are the sounds of Coruscant in the background. Being in a megapolis with everyone busy with their own lives make for the perfect cover for evil to hide in plain sight.