web audio complex example

let context;let compressor;let reverb;let source1, source2, source3;let lowpassFilter;let waveShaper;let panner;let dry1, dry2, dry3;let wet1, wet2, wet3;let mainDry;let mainWet;function setupRoutingGraph () {  context = new AudioContext();  // Create the effects nodes.  lowpassFilter = context.createBiquadFilter();  waveShaper = context.createWaveShaper();  panner = context.createPanner();  compressor = context.createDynamicsCompressor();  reverb = context.createConvolver();  // Create main wet and dry.  mainDry = context.createGain();  mainWet = context.createGain();  // Connect final compressor to final destination.  compressor.connect(context.destination);  // Connect main dry and wet to compressor.  mainDry.connect(compressor);  mainWet.connect(compressor);  // Connect reverb to main wet.  reverb.connect(mainWet);  // Create a few sources.  source1 = context.createBufferSource();  source2 = context.createBufferSource();  source3 = context.createOscillator();  source1.buffer = manTalkingBuffer;  source2.buffer = footstepsBuffer;  source3.frequency.value = 440;  // Connect source1  dry1 = context.createGain();  wet1 = context.createGain();  source1.connect(lowpassFilter);  lowpassFilter.connect(dry1);  lowpassFilter.connect(wet1);  dry1.connect(mainDry);  wet1.connect(reverb);  // Connect source2  dry2 = context.createGain();  wet2 = context.createGain();  source2.connect(waveShaper);  waveShaper.connect(dry2);  waveShaper.connect(wet2);  dry2.connect(mainDry);  wet2.connect(reverb);  // Connect source3  dry3 = context.createGain();  wet3 = context.createGain();  source3.connect(panner);  panner.connect(dry3);  panner.connect(wet3);  dry3.connect(mainDry);  wet3.connect(reverb);  // Start the sources now.  source1.start(0);  source2.start(0);  source3.start(0);}