CUE Live represents an innovative approach to audience engagement technology, utilizing ultrasonic sound waves to create synchronized interactive experiences at live events. The Android application developed by CUE Audio enables smartphones to receive inaudible audio signals that trigger coordinated visual displays across multiple devices simultaneously, transforming audience members into active participants in the event's visual presentation. The application's core functionality revolves around its ability to decode ultrasonic signals transmitted through venue sound systems. When activated during CUE-enabled events, the app processes these high-frequency sound waves to coordinate smartphone displays, creating unified light shows across the audience. The platform includes demonstration modes that allow users to test functionality before events, along with UPN and DJ modes that provide enhanced control for event organizers and performers seeking to create more sophisticated interactive experiences. User experience depends heavily on proper timing and environmental factors. The interface maintains simplicity with clear activation prompts and visual feedback mechanisms. Real-world usage requires users to launch the application before the synchronized event begins, as the ultrasonic signal transmission occurs at specific intervals. Environmental factors including ambient noise levels, speaker placement, and device microphone sensitivity can impact signal reception reliability across different venue configurations and smartphone models. User feedback indicates consistent patterns regarding synchronization timing requirements. Multiple reviews from Ronda Bernstein dated February 28, 2023, emphasize that successful synchronization requires launching the application before light shows commence. These reviews note that signals cannot be captured if the app activates after transmission begins, suggesting that event organizers like the University of Richmond provide explicit timing instructions to ensure participant readiness. This timing dependency represents a significant consideration for both users and event producers implementing the technology. The application demonstrates strong potential for creating immersive audience experiences when implementation parameters are properly managed. Its innovative use of ultrasonic technology eliminates the need for internet connectivity during events, though this also creates the critical limitation of requiring precise timing for signal capture. The technology appears most effective in controlled event environments where organizers can coordinate participant preparation and ensure optimal audio transmission conditions for reliable ultrasonic signal distribution throughout the venue.