What is Sound Lock?
Picture Lock, as a Starting Point
Most people in film and television already know what Picture Lock means.
Picture lock is a stage in editing a film or editing a television production. It is the stage prior to online editing when all changes to the film or television program cut have been done and approved. It is then sent to subsequent stages in the process, such as online editing and audio mixing. Any last-minute changes can force portions of subsequent work to be redone.
Source: Wikipedia
Sound Lock works on the same principle, but at the opposite end of production. Rather than a stage that closes off picture before sound and online work begin, Sound Lock is a stage that happens before principal photography even starts, in pre-production or development. It could just as easily be called "Pre-Editing". The filmmaker builds a timeline out of concept images long before a camera rolls.
Why Sound Comes First
The "Sound" in Sound Lock refers to where the anchor point comes from. In a Music Video, music takes precedence over visuals. Not because the visuals matter less, but because in the vast majority of Music Videos, the track is composed and recorded before anything is filmed. That track becomes the fixed, "locked" component. It will not change.
With the music locked, the filmmaker uses it as an anchor inside the NLE, building out the envisioned visuals against it. Those visuals might be reference images, hand-drawn sketches, 3D generated shots, or increasingly, AI generated storyboards, depending on the filmmaker's own workflow.
This is not a new idea. Filmmakers, Music Video directors, and animators have worked this way for a long time.
The Missing Piece
The real difficulty has never been building the sequence. It is getting shot and scene information out of the NLE and onto the set in a usable form.
Once a sequence like this is cut, an NLE typically offers only one way out: exporting it as a rendered video file. That is not much help on set, and shot information extracted this way is inconsistent at best. The alternative is manually building a Shot List from the envisioned visuals by hand, which usually means stacks of printed pages for every department, and a workflow that is far from eco-friendly.
Applications like Shot Lister, Studio Binder, and FrameForge already do a good job of building industry-standard Shot Lists. But they all start from the script. There is nothing wrong with that; the script is the anchor for most productions, and screenplay is the foundation everything else is built on.
Music Videos and other music-driven narratives do not have that anchor. Music cannot be visualised on a page, aside from a musical score, and a Shot List cannot realistically be built from a score sheet.
Where the Idea Came From
The idea behind this workflow first came about while working on commercial projects around 15 years ago. At the time, there was no streamlined workflow or application that addressed it.
Database tools were part of the problem too. The mainstream options at the time were things like Microsoft Access and FileMaker Pro, which usually meant hiring a consultant to build a custom database, an approach that was both complicated and costly.
More recently, cloud-based database tools like Notion have changed that. With data now central to how most productions operate, these tools offer a far more intuitive and cost-effective way to work.
That same idea, applied directly to the problem above, is what streamlines and optimises Shot List generation from within Final Cut Pro today.
Is it conceivable to craft an application that finally bridges Sound Lock editorial and on-set shot information?