Like picture editing, the completion of sound for a film also goes through a series of component parts. These normally start after “picture lock” and are performed by a team of sound editors and mixers. On small, indie films, a single sound designer/editor/mixer might cover all of these roles. On larger films, specific tasks are covered by different individuals. Depending on whether it’s one individual or a team, sound post can take anywhere from four weeks to several months to complete.
Location mixing – During original production, the recording of live sound is handled by the location mixer. This is considered mixing, because originally, multiple mics were mixed “on-the-fly” to a single mono or stereo recording device. In modern films with digital location recordings, the mixer tends to record what is really only a mixed reference track for the editors, while simultaneously recording separate tracks of each isolated microphone to be used in the actual post production mix.
ADR – automatic dialogue replacement or “looping”. ADR is the recording of replacement dialogue in sync with the picture. The actors do this while watching their performance on screen. Sometimes this is done during production and sometimes during post. ADR will be used when location audio has technical flaws. Sometimes ADR is also used to record additional dialogue – for instance, when an actor has his or her back turned. ADR can also be used to record “sanitized” dialogue to remove profanity.
Walla or “group loop” – Additional audio is recorded for groups of people. This is usually for background sounds, like guests in a restaurant. The term “walla” comes from the fact that actors were (and often still are) instructed to say “walla, walla, walla” instead of real dialogue. The point is to create a sound effect of a crowd murmuring, without any recognizable dialogue line being heard. You don’t want anything distinctive to stand out above the murmur, other than the lead actors’ dialogue lines.
Dialogue editing – When the film editor (i.e. the picture editor) hands over the locked cut to the sound editors, it generally will include all properly edited dialogue for the scenes. However, this is not prepared for mixing. The dialogue editor will take this cut and break out all individual mic tracks. They will make sure all director’s cues are removed and they will often add room tone and ambience to smooth out the recording. In addition, specific actor mics will be grouped to common tracks so that it is easier to mix and apply specific processing, as needed, for any given character.
Sound effects editing/sound design – Sound effects for a film come from a variety of sources, including live recordings, sound effects libraries and sound synthesizers. Putting this all together is the role of the sound effects editor(s). Because many have elevated the art, by creating very specific senses of place, the term “sound designer” has come into vogue. For example, the villain’s lair might always feature certain sounds that are identifiable with that character – e.g. dripping water, rats squeaking, a distant clock chiming, etc. These become thematic, just like a character’s musical theme. The sound effects editors are the ones that record, find and place such sound effects.
Foley – Foley is the art of live sound effects recording. This is often done by a two-person team consisting of a recordist and a Foley walker, who is the artist physically performing these sounds. It literally IS a performance, because the walker does this in sync to the picture. Examples of Foley include footsteps, clothes rustling, punches in a fight scene and so on. It is usually faster and more appropriate-sounding to record live sound effects than to use library cues from a CD.
In addition to standard sound effects, additional Foley is recorded for international mixes. When an actor deliveries a dialogue line over a sound recorded as part of a scene – a door closing or a cup being set on a table – that sound will naturally be removed when English dialogue is replaced by foreign dialogue in international versions of the film. Therefore, additional sound effects are recorded to fill in these gaps. Having a proper international mix (often called “fully filled”) is usually a deliverable requirement by any distributor.
Music – In an ideal film scenario, a composer creates all the music for a film. He or she is working in parallel with the sound and dialogue editors. Music is usually divided between source cues (e.g. the background songs playing from a jukebox at a bar) and musical score.
Recorded songs may also be used as score elements during montages. Sometimes different musicians, other than the composer, will create songs for source cues or for use in the score. Alternatively, the producers may license affordable recordings from unsigned artists. Rarely is recognizable popular music used, unless the production has a huge budget. It is important that the producers, composer and sound editors communicate with each other, to define whether items like songs are to be treated as a musical element or as a background sound effect.
The best situation is when an experienced film composer delivers all completed music that is timed and synced to picture. The composer may deliver the score in submixed, musical stems (rhythm instruments separated from lead instruments, for instance) for greater control in the mix. However, sometimes it isn’t possible for the composer to provide a finished, ready-to-mix score. In that case, a music editor may get involved, in order to edit and position music to picture as if it were the score.
Laugh tracks – This is usually a part of sitcom TV production and not feature films. When laugh tracks are added, the laughs are usually placed by sound effects editors who specialize in adding laughs. The appropriate laugh tracks are kept separate so they can be added or removed in the final mix and/or as part of any deliverables.
Re-recording mix – Since location recording is called location mixing, the final, post production mix is called a re-recording mix. This is the point at which divergent sound elements – dialogue, ADR, sound effects, Foley and music – all meet and are mixed in sync to the final picture. On a large film, these various elements can easily take up 150 or more tracks and require two or three mixers to man the console. With the introduction of automated systems and the ability to completely mix “in the box”, using a DAW like Pro Tools, smaller films may be mixed by one or two mixers. Typically the lead mixer handles the dialogue tracks and the second and third mixers control sound effects and music. Mixing most feature films takes one to two weeks, plus the time to output various deliverable versions (stereo, surround, international, etc.).
The deliverable requirements for most TV shows and features are to create a so-called composite mix (in several variations), along with separate stems for dialogue, sound effects and music. A stem is a submix of just a group of component items, such as a stereo stem for only dialogue.The combination of the stems should equal the mix. By having stems available, the distributors can easily create foreign versions and trailers.
©2013 Oliver Peters