jquery - Get Relative Loudness of Song, Javascript -



jquery - Get Relative Loudness of Song, Javascript -

i'm trying build mp3 player site using javascript (and plugins/frameworks(jquery)/libraries relevant) & html5. built player (more accurately, implemented jplayer), and want create visualizer.

ok maybe it's not visualizer (all names ways visualize sound confused me), guess want this:

or graphs amplitude (loudness) of mp3.

so start, know api can this?

if don't that's ok; guess i'll build own. need know:

does know way amplitude/loudness of mp3 @ given point using javascript?

edit

changed question php: visualization of mp3 - php

you need able decode mp3 yourself. html5 sound element, , browsers's implementations of it, don't expose sort of data. example, @ firefox's exposed methods javascript. closest thing want "volumechange" event. in reference volume mixer on browser's rendered command (i.e. output volume). has nil actual db of sound source.

i imagine feasible way render waveform graphic ahead of time, , "reveal" song plays (e.g. "timeupdate" event).

javascript jquery html html5 mp3

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