A remix is an alternative version of a recorded song, made from an original version. Sometimes this term is also used for alterations of media or recreation other than song (film, literature, beverages etc.).

A remixer uses audio mixing to compose an alternate master recording of a song, adding or subtracting elements, or simply changing the equalization, dynamics, pitch, tempo, playing time, or almost any other aspect of the various musical components. Some remixes involve substantial changes to the arrangement of a recorded work, but many are harmonic, such as creating a "vocal up" version of a song that emphasizes the lead singer's voice. Contemporary remixes are often produced in a Digital Audio Workstation (DAW), which allow producers to reorganize tracks and apply various effects.

Songs are remixed for a variety of reasons:

Remixes should not be confused with edits, which usually involve shortening a final stereo master for marketing or broadcasting purposes. Another distinction should be made between a remix and a cover. A remix song recombines audio pieces from a recording to create an altered version of the song. A cover is a recording of a song that was previously recorded by someone else.

A soundtrack can be recorded music accompanying and synchronized to the images of a motion picture, book, television program or video game; a commercially released soundtrack album of music as featured in the soundtrack of a film or TV show; or the physical area of a film that contains the synchronized recorded sound.

In movie industry terminology usage, a sound track is an audio recording created or used in film production or post-production. Initially the dialogue, sound effects, and music in a film each has its own separate track (dialogue track, sound effects track, and music track), and these are mixed together to make what is called the composite track, which is heard in the film. A dubbing track is often later created when films are dubbed into another language. This is also known as a M & E track (music and effects) containing all sound elements minus dialogue which is then supplied by the foreign distributor in the native language of its territory.

The contraction soundtrack came into public consciousness with the advent of so-called "soundtrack albums" in the early 1950s. First conceived by movie companies as a promotional gimmick for new films, these commercially available recordings were labeled and advertised as "music from the original motion picture soundtrack." This phrase was soon shortened to just "original motion picture soundtrack." More accurately, such recordings are made from a film's music track, because they usually consist of the isolated music from a film, not the composite (sound) track with dialogue and sound effects.

Aishwarya Rai, known also as Aishwarya Rai Bachchan after her marriage (Tulu pronunciation [əjɕʋərjaː rəj]; born 1 November 1973) is an Indian film actress. She worked as a model before starting her acting career, and ultimately won the Miss World pageant in 1994. Rai has featured in films in various languages including Hindi, English, Tamil, Telugu, and Bengali.

Often cited by the media as the "most beautiful woman in the world", Rai made her acting debut with Mani Ratnam's Tamil film Iruvar (1997), and had her first commercial success in Jeans (1998). She found success in Bollywood with Sanjay Leela Bhansali's Hum Dil De Chuke Sanam (1999) and Devdas (2002) and eventually won two Filmfare Awards in the Best Actress category.

After a series of unsuccessful films during 2003–2005, she appeared in the blockbuster action thriller Dhoom 2 (2006) and subsequently featured in such films as Guru (2007), Jodhaa Akbar (2008), and Enthiran (2010). She gained critical acclaim for her performances in offbeat, independent films such as Chokher Bali (2003), Raincoat (2004), and Provoked (2007). Rai has thus established herself as one of the leading contemporary actresses of Indian cinema.