title: Audio Levels
media types: Audio
description: Compute the audio amplitude.
creator: Dan Dennedy
contributor: Marco Gittler
contributor: Steve Harris
copyright: Dan Dennedy, Marco Gittler, and Steve Harris
This filter provides the amplitude level as a percentage value in floating point. This does not do any "slowing" of the data by averaging out peaks and troughs of short duration like a VU meter. Applications can also get this data on the frame as meta.media.audio_level.<N> where <N> is the channel number starting with 0.
title: Use IEC 60268-18 Scale
title: output true peak value in dB instead of a percentage in _audio_level.
<N> is the channel number starting with 0. This is updated on every frame with audio.