Directors and writers may choose to incorporate a mirror into a scene for multiple reasons.
A character looking into a mirror and conversing with himself/herself can express vanity, loneliness, contemplation, introspection/self-analysis, multiple personalities, etc. Mirrors can also simply show more of the room.
The way many onscreen characters interact with their reflection in the mirror, it is like their reflection is another character... an uncredited role. A monologue for two.
I wanted to alter the sound accompanying the image to amplify the voice, thoughts, and listening of the reflection.
The reflection is no longer mute and passive.
What if your reflection could talk back and critique you?
I took scenes directly from DVDs and used Ableton Live to edit audio for the different clips.
All About Eve (1950)
Baisers volés (1968)
Taxi Driver (1976)
The Royal Tenenbaums (2001)
I Heart Huckabees (2004)
The majority of the mirror scenes I used did not have the character speaking - I brought in audio from other scenes in the film that I found relevant.