Sound on film
AKA
Phonofilm, Tri-Ergon, Movietone, Photophone, Fantasound
Era
1923–2000s
Format
Pre-1990s: analog
1990s onward: digital
Developed by
Various
(Max) Capacity
Various
Size
Various
Fun facts
- This format includes any process where audio is transformed into a visual representation and printed onto film, either alongside or separate from moving images
- This process can be either an analog sound track or digital audio track, and the signal can be recorded optically or magnetically
- Prior to this invention, the film's soundtrack could be played on a separate phonograph record or performed live
