Sound - Diegetic and non-Diegetic

Diegetic sound, is sound that you can here on screen.
For example:

• Voice of characters
• Sounds made by objects being moved
• musical instrument being played on set.

Digetic sound can be either on screen or off screen depending on whatever its source is within the frame or outside the frame. 


Non-Diegetic, is sound that cannot be seen on the screen
For example:

• narrator's commentary
• sound effects which is added for the dramatic effect
• mood music

Non-diegetic sound is represented as coming from the a source outside story space.