What is my contribution?
I contribute to the frontend and user experience of CRREO as part of the team. Within editing, the scope presented in this portfolio includes timeline interactions, regeneration controls and audio adjustments. The broader creation workflow is covered in the companion case study.
This account focuses on interface responsibilities and design considerations. It does not disclose internal implementation details or attribute the entire editor to one person.
How should selection relate to playback?
A timeline can have a playback position and a selected object at the same time. Those concepts answer different questions: where am I watching, and what am I editing? If they look identical, it becomes difficult to predict which object a control will affect.
For this class of interface, I use three review questions: can the user identify the selected object, can they identify the current playback position, and can they leave a selection without unintentionally changing the project? These questions apply to pointer and keyboard interaction alike.
How can regeneration make its scope clear?
Regeneration adds a time dimension to editing: an action starts now and produces an output later. The initiating control needs a clear scope. A pending state should remain distinguishable from a finished result, and an error should point to a recoverable next action.
A practical review follows the action through four moments: before submission, while processing, when a result is available, and after failure. The visual treatment should help users distinguish those moments without relying on colour alone.
- Name the object or media that will be regenerated.
- Distinguish an in-progress operation from an editable result.
- Preserve enough context for the user to understand what failed.
What makes an audio control usable?
Audio adjustments need readable labels, predictable ranges and feedback that matches the control. A slider with no understandable value can look precise while remaining difficult to use.
The W3C slider pattern describes keyboard operation and meaningful value text. It is a useful reference when reviewing a seek or adjustment control. Touch and assistive technology still require real-device testing; applying ARIA does not by itself verify the interaction.
What should a review validate?
The useful unit of review is a sequence: select a scene, adjust a setting, preview the change, then move to another object. A control can work in isolation while leaving stale or confusing selection feedback after the sequence.
This case study describes my contribution and a way to reason about the work. It makes no measured claim about editing speed or completion rates. Those outcomes would require a defined baseline and product analytics.