NotAuraRGBMusic

Definitely not Aura RGB Music mode.

Flash lights according scientific calculation.
It blasts with funky music and stay calm in monotone.
Instead of programming from bottom, it is scripted from top. Yes, it's a web application.

NodeJS 32-bit ( from aura-sdk a.k.a this thread ), v8 or higher (written in ES2016+)
A Web Browser Supporting WebAudio ( It's in HTML5 spec ) and ES2016+
Internet Connection ( Installation + Fetching scripts on run )
An avaliable internet port ( default http://localhost:9997/ )
A PC running Aura RGB ( Currently works in graphic card only )
Chrome 66+ for enabling AudioWorklet, a new sound processing routine. -- ( Currently having 360+ FPS on sound processing instead of V-synced with canvas )

Clone or Download this repository
Locate the folder ./NotAuraRGBMusic via CLI -- For Windows, go to that folder, Shift+Enter and "open console in folder".
npm install
npm start or node AURA_WS.js
Double check your default System Sound Input and Output ( Webpage use default options only )
Open http://localhost:9997/ in browser
Make sure you open it in a separate Window ( It halts when switched tab or minimized - To be investigated. )
Click ( required by recent Chrome ) and enjoy the blast!

Fetch, tune (if you want), and analyse Audio, then obtatin sound volume ( by rms ) and base frequency ( detault autocorrelation, with FFT peak as fallback )
Calculate the relative power level from sound volume ( ranged from [0,1], based from the lowest sound volume in FFT spectrum )
Draw the spectrum via canvas:

x-axis	y-axis	color
octave	decibel	frequency of light spectrum

autocorrelation	FFT peak
White	Black

Merge the base frequency ( as the color of the mark ) and relative sound volume ( as a number from 0 to 1 ) into the final color as RGB value
Draw the spectrum, and send the RGB value to server via WebSocket
When server received RGB value, buffer it and poll to Aura RGB devices by interval

Version	Description
0.0.1	Initial (and still in progress) commit