Pronunciation: [fˈe͡ɪd ˌɛstˌiːˈe͡ɪt͡ʃ ˈɪn] (IPA) 
The verb "fade (sth) in," meaning to gradually blend or become visible, is spelled /feɪd ɪn/. The first syllable "fade" rhymes with "paid," and the second syllable "in" rhymes with "bin." The phonetic transcription of the word indicates that the "a" in "fade" is pronounced as a long "a" or "eɪ" sound, while the final "e" is silent. The "d" at the end of "fade" is pronounced softly, almost like a "t."
The phrase "fade (something) in" refers to gradually bringing something, typically audio or visuals, into prominence or perceptibility. It involves the process of gradually increasing the volume or visibility of a particular element or effect, usually within the context of multimedia content creation or audiovisual presentations.
In cinematography or video editing, "fade in" is a transition effect wherein an initially black or blank screen gradually becomes brighter or reveals an image, character, or scene. This effect is often employed in the opening of movies, TV shows, or video presentations, creating a smooth and gradual introduction that captures the viewer's attention.
Similarly, "fade in" can also pertain to audio. For instance, in sound engineering or music production, "fade in" involves progressively increasing the volume or audibility of a specific audio element, gradually bringing it into focus. This technique is commonly used at the beginning of songs or tracks to create a seamless and gentle start.
Overall, "fade (something) in" involves the gradual emergence or appearance of particular elements, be it visuals or audio, facilitating a smooth transition or introduction. It adds a subtle and aesthetically pleasing effect, promoting a gradual immersive experience for the audience, be it in movies, videos, presentations, or musical compositions.
