A volume unit (VU) meter device, displaying the audio signal level.
Implemented in SVG and JavaScript.
- visualize average volume of a signal (loudness)
- very slow (does not respond to peaks)
- main logarithmic response with scale -20..+3 db
- secondary % scale
- visually sets a +3db red zone
- configurable rise / fall time. deafult to 300ms.
- voice oriented frequency response
- configurable 0VU point. -18dBFS by default.