Minim AudioBuffer level Description Gets the current level of the buffer. It is calculated as the root-mean-square of all the samples in the buffer. Signature ```float level() ``` Returns float: the RMS amplitude of the buffer Related AudioBuffer Example ```/** * This sketch demonstrates how to use the AudioBuffer objects of an AudioPlayer * to draw the waveform and level of the sound as it is playing. These same * AudioBuffer objects are available on AudioInput, AudioOuput, and AudioSample, * so they same drawing code will work in those cases. * */ import ddf.minim.*; Minim minim; AudioPlayer groove; void setup() { size(1024, 200); minim = new Minim(this); groove = minim.loadFile("groove.mp3", 1024); groove.loop(); } void draw() { background(0); stroke( 255 ); // draw the waveforms // the values returned by left.get() and right.get() will be between -1 and 1, // so we need to scale them up to see the waveform // note that if the file is MONO, left.get() and right.get() will return the same value for(int i = 0; i < groove.bufferSize() - 1; i++) { float x1 = map( i, 0, groove.bufferSize(), 0, width ); float x2 = map( i+1, 0, groove.bufferSize(), 0, width ); line( x1, 50 + groove.left.get(i)*50, x2, 50 + groove.left.get(i+1)*50 ); line( x1, 150 + groove.right.get(i)*50, x2, 150 + groove.right.get(i+1)*50 ); } noStroke(); fill( 255, 128 ); // the value returned by the level method is the RMS (root-mean-square) // value of the current buffer of audio. // see: http://en.wikipedia.org/wiki/Root_mean_square rect( 0, 0, groove.left.level()*width, 100 ); rect( 0, 100, groove.right.level()*width, 100 ); } ``` Usage Web & Application