Three concert tools: LED text, a glow screen and sound readings

These tools display scrolling text, turn the screen into a colour panel, or show changes in microphone input. They serve different purposes at a live event.

Enter a short message, then adjust size, colour and scrolling speed. At a distance, a few large words are usually easier to recognise than a paragraph.

Fullscreen and screen-wake behaviour depend on browser support and system state. Try them before the event, and consider nearby viewers when using flashing effects.

Choose a support colour or try a breathing or pulse effect. Treat it as a screen display rather than a brightness replacement for a physical light stick.

Check battery level, brightness and venue rules before use. Preparing the page in advance reduces adjustments during the show.

With microphone permission, the tool can display changes in audio input. Phone model, microphone gain and calibration affect the values, so readings from different devices are not directly comparable.

It does not replace a calibrated sound-level meter or establish whether a venue is safe. Keep the position and setup consistent when observing changes.