DCP Creation & Delivery
for Filmmakers, Trusted by Film Festivals
DCP Creation & Delivery
for Filmmakers, Trusted by Film Festivals
Cinema audio plays louder, sounds different, and follows different rules than the audio on your TV, laptop, or streaming platform. If your film’s sound mix was built for YouTube or broadcast — or done entirely on headphones — it may not translate well to a theater.
This guide explains what cinema audio levels are, what they mean for your DCP, and what to do if you’re not sure your mix is ready for the big screen. No sound engineering degree required.
When you watch a film on Netflix, YouTube, or broadcast TV, the platform automatically adjusts the audio to a standardized level. Everything ends up sounding roughly the same volume, no matter what the original mix sounded like. Cinema does not work this way.
In a theater, your audio plays exactly as delivered — at reference level, through a calibrated speaker system, in a room specifically designed to carry sound to every seat. There is no automatic volume adjustment, no compression applied by a streaming algorithm, and no one pressing a remote control to turn it down. What you deliver is what the audience hears.
This means two things for filmmakers:
You will encounter two technical measurements when preparing audio for a DCP. Here is what they mean in plain language:
LUFS (Loudness Units Full Scale) is a measure of the average perceived loudness of your audio over time. Think of it as the overall volume impression of your film — not the loudest moment, but the overall level as the audience experiences it.
LUFS values are negative numbers. The closer to zero, the louder the audio. The further from zero (more negative), the quieter.
|
LUFS Value
|
Level
|
What It Means for Cinema
|
|---|---|---|
|
-14 LUFS
|
Very loud (streaming level)
|
YouTube/Spotify target — too loud and over-compressed for cinema
|
|
-18 to -20 LUFS
|
Cinema sweet spot
|
The practical target range for most independent films and shorts
|
|
-23 LUFS
|
Broadcast standard
|
TV/EBU target — often too quiet for cinema; dialogue may get lost
|
|
-27 LUFS
|
Quiet theatrical mix
|
Typical for dialogue-heavy drama with wide dynamic range
|
|
-35 LUFS and below
|
Too quiet for cinema
|
Will likely sound inaudible at normal cinema playback levels
|
The highlighted range — -18 to -20 LUFS — is a practical target for most independent films going to festivals. It is not an official standard for theatrical release (major studio films have a professional sound mixer making these decisions), but it is a safe, tested range that will sound appropriate at cinema playback levels without being uncomfortably loud or inaudibly quiet.
Important: If your film has wide dynamic range — very quiet dialogue scenes and very loud action sequences — your integrated LUFS may be lower than -20 even if the mix sounds correct. LUFS measures the average, not the peaks. A -25 LUFS theatrical mix is not necessarily wrong if the dynamic range is intentional.
True Peak measures the absolute loudest point in your audio — the ceiling. For DCP delivery, True Peak should stay below 0 dBTP (the point of digital clipping). The generally accepted target is to keep True Peak below -2 dBTP, which provides a small safety margin against clipping that can occur during format conversion.
Unlike LUFS, True Peak is not about creative loudness — it is a technical ceiling. Exceeding 0 dBTP results in audible distortion. Most professional mixes stay well below this limit naturally.
This is the most common question we hear from filmmakers mixing their own audio, and the answer depends on your situation.
A cinema sound system is built around a center speaker behind the screen. This is where dialogue lives. In a properly configured surround mix, all dialogue comes from the center channel — directly in front of the audience, wherever they sit.
With a stereo mix, there is no center channel. Dialogue comes from the left and right speakers only. If you are sitting in the center of the theater, stereo can sound reasonable. But if you are sitting to the left or right — which describes the majority of seats in any theater — dialogue appears to come from the nearest side speaker, not from the screen. For a dialogue-heavy film, this is a significant problem.
|
Format
|
Channels
|
When to use it
|
|---|---|---|
|
Stereo (2.0)
|
Left + Right only
|
Small festivals, non-theatrical screenings, or when budget doesn't allow a re-mix. Not accepted at Academy-qualifying festivals. Dialogue localization suffers in larger theaters.
|
|
LCR (3.0)
|
Left + Center + Right
|
A good middle ground. Dialogue goes to the center channel — the most important improvement. Music and effects stay on Left and Right. Easier to achieve than full 5.1.
|
|
5.1 Surround
|
L + R + C + LFE + LS + RS
|
The standard for theatrical exhibition. Required at most major festivals and for Academy qualification. Delivers the full cinema audio experience.
|
Pure DCP packages your audio in whatever format you deliver. If you send us a stereo file, we create a stereo DCP. If you send us a 5.1 mix as six separate mono WAV files, we package that correctly. We do not upmix stereo to 5.1 — the result of an automated upmix is rarely an improvement and can introduce artifacts that sound worse than clean stereo.
A note on dual mono: We occasionally receive stereo files where all audio tracks were mixed with no left/right panning — everything centered. This produces a file that looks like stereo but is technically dual mono, with identical content on both the left and right channels. When packaged as a standard stereo DCP, this audio still plays from the left and right speakers with no center channel, carrying all of the same dialogue localization problems as regular stereo. If your entire mix was done with tracks centered up rather than panned, this is worth knowing before your DCP is created. When we identify a dual mono file, we contact the filmmaker to discuss options — whether that means delivering as-is, or supplying an updated audio file. Include a note with your order if you suspect this applies to your mix and we will check before encoding.
Many independent filmmakers — particularly short film makers — handle their own audio in their editing software. This is completely valid, but there are a few practical things to know before delivering for DCP.
Most professional editing applications (Premiere Pro, DaVinci Resolve, Final Cut Pro) include a loudness meter that can measure LUFS. Before exporting your audio for DCP delivery, check your integrated LUFS reading against the -18 to -20 LUFS target range.
These are guidelines, not absolutes. A film with intentionally wide dynamic range — long quiet passages followed by sudden loud moments — may measure at -25 LUFS overall while still being perfectly appropriate for cinema. Trust your ears alongside the meters.
Headphone mixes tend to be louder and more compressed than what sounds natural in a cinema. If your entire mix was done on headphones, it may translate to a theater as fatiguing, harsh, or over-processed. If possible, check your mix on speakers before delivering — even basic studio monitors or a decent home stereo system will give you a better read on how it will translate than headphones alone.
If your film is heading to a significant festival, has complex sound design, or you want it to sound its best in a theatrical setting, working with a professional sound mixer is worthwhile. A mixer experienced in theatrical delivery will understand cinema reference levels, proper 5.1 configuration, and how to make a mix translate well in a large room.
If you do work with a professional mixer, let them know the film is destined for a DCP and theatrical screenings. A mixer who primarily works in broadcast or online content may default to -23 LUFS (the broadcast standard) without realizing cinema requires a different approach.
When delivering your audio to Pure DCP, please use the following specifications:
|
Specification
|
Required
|
|---|---|
|
File format
|
WAV (uncompressed PCM)
|
|
Sample rate
|
48 kHz
|
|
Channel layout (5.1)
|
Left, Right, Center, LFE, Left Surround, Right Surround — delivered as six separate mono WAV files, a correctly mapped interleaved WAV file, or embedded in your video file (ProRes, etc.) with channels in the correct order
|
|
True Peak ceiling
|
Below 0 dBTP — target below -2 dBTP
|
|
Integrated loudness target
|
-18 to -20 LUFS for most films (see guidance above)
|
Not sure about your audio? Include a note with your order and we will check your audio levels as part of our spot-check review before encoding. If there is a significant issue — such as clipping or audio that is clearly too quiet — we will contact you before proceeding.
For most independent films and festival submissions, -18 to -20 LUFS is a practical target. This is not an official standard — major theatrical releases are mixed by professional sound engineers who make these decisions based on the specific film — but it is a tested, safe range for cinema playback that avoids being too quiet or uncomfortably loud.
A true 16:9 file with no baked-in black bars goes into a Flat container. The 1.78:1 image sits inside the 1.85:1 Flat container with a very small amount of pillar-boxing on the sides — so thin it is barely noticeable in a theater. However, if your 16:9 file has baked-in black bars making the actual picture 2.39:1, it should go into a Scope container with the black bars cropped out during encoding.
No — Pure DCP determines the correct container for you based on your source file. If your situation is unusual or you have a specific preference, add a note to your order and we will follow your instructions. We will always contact you before encoding if there is genuine ambiguity.
A floating window occurs when a film ends up in the wrong container — for example, a 2.39:1 image placed inside a Flat container and projected on a Scope screen. The result is black bars on all four sides of the image, with the picture appearing to float in the center of the screen. It is a mastering error that is distracting for audiences and reflects poorly on the film. It is also one of the most common reasons a DCP gets flagged by a festival technical reviewer.
No. Pure DCP pricing is based on runtime and resolution (2K or 4K), not aspect ratio. Whether your film is Flat or Scope, the price is the same.
No. 2.35:1 goes into a Scope container. The slight difference means there will be very thin pillar-boxing inside the container — barely visible in a theater — and this is completely standard practice. Most films labeled 2.35:1 from the anamorphic era were effectively projected at 2.39:1 anyway due to lens tolerances.
Submit your source file and audio at puredcp.com/order-dcp. If you have questions about your audio mix before ordering, contact us at info@puredcp.com or 818-843-1262 — we are happy to take a look at your specifications before you commit to an order.
Digital delivery and 6 months cloud storage included with every order.
