implement audio analysis from felix turner

[jeromeetienne]

http://www.airtightinteractive.com/2013/10/making-audio-reactive-visuals/

- Volume - the thicker bar on the right hand side
- Waveform - the jagged white line
- Levels - the bar chart of frequency amplitudes, from bass on the left to treble on the right.
- Beat Detection - the volume bar flashes white when a beat is detected. The white line above the volume bar indicates the beat threshold.

[jeromeetienne]

@erichlof have you seen this one ?

[erichlof]

Hi Jerome,
Haven't seen this one before - thanks for the link. Something similar is here: http://www.smartjava.org/content/exploring-html5-web-audio-visualizing-sound

But this is less advanced than your link. Felix has more visual effects at work in his examples. :)

[jeromeetienne]

some of it done. not the beatdetector tho