Sound notes

 Diegetic

- Camera sound works well for sound effects buzzers (some buzzers added to be louder and more jarring)

- Car door slam needs to be dubbed (done)

- Dialogue and car engine dubbed (done)

- record ambient sound (done)

- Clock ticking sound, grandfather clock sound, more sinister and suspenseful than watch 

Non-diegetic

- Copyright free, Tchaikovsky's dance of the sugar plum fairy

- In apartment, mono, sped-up, high-pitched, denoised - music-box feel

- On mother, stereo, slowed-down, warped, parametric EQ