Web Audio API: "interface RealtimeAnalyserNode : AudioNode {
// Real-time frequency-domain data
void getFloatFrequencyData(in Float32Array array);
void getByteFrequencyData(in Uint8Array array);
// Real-time waveform data
void getByteTimeDomainData(in Uint8Array array);
attribute unsigned long fftSize;
readonly attribute unsigned long frequencyBinCount;
attribute float minDecibels;
attribute float maxDecibels;
attribute float smoothingTimeConstant;
};"
