Soundtrack
The complete audio track of a film, or the commercial album of music from that film released separately.
Soundtrack
noun | Post-Production
The complete audio track of a film, comprising every sound element heard in the finished picture: dialogue, sound effects, Foley, ambience, score, and source music. In popular usage, the term also refers to a separately released commercial album of music from the film, which may include the original score, licensed songs, or both.
Quick Reference
| Also Known As | OMPS (Original Motion Picture Soundtrack), audio track |
| Domain | Post-Production |
| Also Used In | Distribution & Markets (commercial album release) |
| Related Terms | Score, Diegetic Sound, Non-Diegetic Sound, Mixing, Sound |
| See Also (Tools) | Audio Bitrate Calculator |
| Difficulty | Foundational |
The Explanation: How & Why
A film's soundtrack has two distinct meanings that coexist in professional and popular usage. Understanding both is necessary because the same word changes meaning depending on who is speaking.
In its technical meaning, the soundtrack is the entire audio dimension of the finished film. It includes the dialogue track (production sound and ADR), the Foley track (performed physical sounds), the sound effects and ambience tracks (environmental and designed audio), and the music tracks (score and source music). The final mix brings all these layers together. The soundtrack, in this sense, is the audio equivalent of the picture: a finished, complete deliverable formatted according to the technical specifications of the exhibition platform.
The delivery format determines the technical specification. A Dolby Atmos theatrical mix is delivered as a BWAV ADM file at 48 kHz, 24-bit. A Netflix streaming delivery requires -27 LUFS integrated loudness with a -2.0 dBTP true peak maximum, per Netflix Sound Mix Specifications. Amazon Prime Video targets -24 LUFS with -2.0 dBTP. Apple TV+ targets -24 LUFS with a tighter -1.0 dBTP true peak limit. These differences cause QC rejections when audio teams assume one spec fits all platforms.
In its commercial meaning, "soundtrack" refers to the album of music released in conjunction with a film. A score-only album presents the original compositions as a listening experience. A song soundtrack collects licensed tracks used in the film. A mixed album combines both. The commercial soundtrack album extends the film's cultural presence and generates secondary revenue. The Purple Rain (1984) soundtrack sold over 25 million copies, outselling the film many times over.
Historical Context & Origin
The physical soundtrack on film was originally a photographic optical track printed alongside the image on the same strip of film. This variable density or variable area optical encoding of the audio signal was read by a light sensor in the projector. The optical track was introduced with synchronized sound cinema from 1927 to 1929 and remained the standard for theatrical exhibition until digital audio formats (Dolby Digital, DTS, SDDS) replaced optical tracks in the 1990s. The term "soundtrack" derives from this physical optical audio track running beside the image on the filmstrip: the "sound track" in the most literal sense. The SMPTE standardized optical audio recording specifications in the 1930s. Commercial exploitation of film music as a separate product began with soundtrack albums in the 1950s, initially featuring popular songs from musicals. The practice expanded through the 1960s and 1970s into a major music industry category, peaking commercially with the blockbuster era of the late 1970s and 1980s.
How It's Used in Practice
Scenario 1 - Technical Deliverable (Post-Production Supervisor): After the final mix, the re-recording mixer exports the soundtrack in all required formats. A Dolby Atmos BWAV ADM file goes to the picture finishing facility for IMF creation. A 5.1 surround mix goes to Netflix Content Hub for dubbing reference. A stereo Lt/Rt downmix is delivered for streaming. Each format conforms to the platform's loudness spec: Netflix at -27 LUFS integrated, Amazon at -24 LUFS, Apple TV+ at -24 LUFS with -1.0 dBTP. The post-production supervisor verifies all formats with a Nugen VisLM meter before delivery.
Scenario 2 - Commercial Album (Music Supervisor): A coming-of-age film has used 12 licensed songs plus an original score. The music supervisor compiles a soundtrack album proposal: 8 of the 12 songs and 4 score tracks. The album is pitched to a music label for physical and digital release timed to the film's theatrical opening. The licensing agreements for each track must confirm that album rights are included alongside the film sync rights. A single track missing album rights drops it from the commercial release.
Scenario 3 - Rights Management (Music Supervisor): A film uses a specific song as diegetic source music in a key scene. The music supervisor negotiates sync rights (the right to use the composition in the film) separately from master use rights (the right to use the specific recording) and separately again from soundtrack album rights (the right to include the song on a commercial album). All three must be licensed. Failing to clear any one blocks use in its respective context.
Usage Examples in Sentences
"The soundtrack deliverable includes the full Atmos BWAV ADM, the 5.1 mix, and the stereo Lt/Rt downmix."
"The soundtrack album drops the same week the film opens. 8 licensed songs and 4 score tracks."
"In production conversation, 'soundtrack' usually means the commercial album. In technical conversation, it means the complete audio track of the film."
"The Purple Rain soundtrack sold 25 million copies and outsold the film many times over."
Common Confusions & Misuse
Soundtrack vs. Score: The score is the original music composed for the film: the non-diegetic musical component created specifically for the picture. The soundtrack is either the complete audio track of the film (including dialogue, effects, Foley, and all music) or the commercial music album derived from the film (which may include the score alongside licensed songs). The score is one component of the soundtrack. The soundtrack is not a synonym for the score.
Soundtrack Album vs. Original Motion Picture Score Album: An "Original Motion Picture Soundtrack" album typically contains score music and possibly source songs. An "Original Motion Picture Score" album contains only the composed orchestral or electronic score, without licensed songs. Both are marketed using variations of the soundtrack terminology. The distinction tells the consumer what kind of music to expect.
Variations by Context
| Context | How "Soundtrack" Applies |
|---|---|
| Technical / post-production | The complete audio track of the finished film, delivered in multiple format variations |
| Commercial / popular | An album of music from the film, released separately on physical and digital platforms |
| Theatrical exhibition | The digital audio file formatted for theatrical projection (Dolby Atmos, DTS:X, 7.1) |
| Streaming delivery | The Atmos BWAV ADM, 5.1, or stereo audio track in the IMF deliverable package |
Key People & Films
Ennio Morricone's scores for the Dollars Trilogy and Once Upon a Time in the West (1968) are inseparable from their soundtracks. John Williams defined the modern orchestral soundtrack with Star Wars (1977) and Jaws (1975). Prince's Purple Rain (1984) soundtrack sold over 25 million copies, outperforming the film commercially. Hans Zimmer's work on Dune: Part Two (2024) was mixed in Dolby Atmos and delivered across theatrical, streaming, and album formats. The Bee Gees' Saturday Night Fever (1977) soundtrack spent 24 weeks at number one on the Billboard 200 and certified 16x Platinum.
Equipment / Tools Reference
The Dolby Atmos Renderer produces BWAV ADM files for streaming and theatrical delivery. Avid Pro Tools 2023.12 or newer is required for Netflix BWAV ADM delivery workflows. Nugen VisLM and LM-Correct are industry standards for verifying LUFS compliance across platforms. iZotope Insight 2 provides real-time loudness metering with short-term and momentary readouts. DaVinci Resolve's Fairlight page handles integrated LUFS measurement for post-production workflows. Dolby Atmos Production Suite handles near-field monitoring at 79 or 82 dB SPL per Netflix specifications.
Standards & Specifications
ITU-R BS.1770-1 defines the measurement algorithm underlying all LUFS/LKFS readings. Netflix requires -27 LUFS integrated (dialog-gated) with -2.0 dBTP true peak maximum per their Sound Mix Specifications. Amazon Prime Video targets -24 LUFS with -2.0 dBTP. Apple TV+ targets -24 LUFS with -1.0 dBTP. All platforms require 48 kHz sample rate and 24-bit depth for master delivery. Dolby Atmos delivery follows SMPTE ST 2067-201:2019 for Immersive Audio Bitstream (IAB) within IMF packages. Atmos mixes require a minimum 7.1.4 monitoring room.
Common Questions / FAQ
Q: What is the difference between a film's soundtrack and its score?
A: The score is the original music composed for the film. The soundtrack is the complete audio track of the finished film (including dialogue, effects, Foley, and music) or the commercial album of music from the film. The score is one component of the soundtrack, not a synonym for it.
Q: What loudness level should a film soundtrack be delivered at?
A: It depends on the platform. Netflix requires -27 LUFS integrated with -2.0 dBTP true peak. Amazon Prime Video and Apple TV+ both target -24 LUFS, but Apple's true peak limit is -1.0 dBTP versus Amazon's -2.0 dBTP. Always verify against the platform's current delivery specification before final mix.
Q: Do I need a Dolby Atmos mix for streaming delivery?
A: Atmos is strongly preferred by Apple TV+ for original content and accepted by Netflix and Amazon. A 5.1 surround mix with a stereo downmix is the minimum requirement for most platforms. Atmos delivery requires a BWAV ADM file at 48 kHz, 24-bit, mixed in a minimum 7.1.4 monitoring room.
Related Terms
- Score - The original composed music; a primary component of both the technical soundtrack and the commercial album.
- Diegetic Sound - Source music and story-world audio; part of the complete technical soundtrack.
- Non-Diegetic Sound - Score and narration; the other major audio component of the soundtrack.
- Mixing - The process that creates the finished technical soundtrack from all its component elements.
- Sound - The general category; the soundtrack is the complete audio output of the sound design and mixing process.
- ADR - Automated Dialogue Replacement; a component of the dialogue track within the complete soundtrack.
See Also / Tools
Use the Audio Bitrate Calculator to estimate storage requirements for soundtrack deliverables across formats. For planning the full post-production audio pipeline, the Production Schedule Calculator helps timeline the final mix, QC, and multi-format delivery. Read our Audio Delivery Standards blog post for a detailed comparison of streaming platform specifications.
