frequencyBinCount property
The frequencyBinCount read-only property of the AnalyserNode
contains the total number of data points available to
AudioContext BaseAudioContext.sampleRate. This is half of the value
of the AnalyserNode.fftSize. The two methods' indices have a linear
relationship with the frequencies they represent, between 0 and the
Nyquist frequency.
Implementation
int get frequencyBinCount;