Helper for doing audio analysis. It takes case of connecting the audio stream, running in a loop and pause capability.
Provide a function which works with an AnalyserNode, and does something with the result.
const myAnalysis = (node, analyser) => { const freq = new Float32Array(node.frequencyBinCount); node.getFloatFrequencyData(freq); // Do something with frequency data...}const a = new Analyser(myAnalysis); Copy
const myAnalysis = (node, analyser) => { const freq = new Float32Array(node.frequencyBinCount); node.getFloatFrequencyData(freq); // Do something with frequency data...}const a = new Analyser(myAnalysis);
Two helper functions provide ready-to-use Analysers:
Note: Browers won't allow microphone access unless the call has come from a user-interaction, eg pointerup event handler.
Returns the starting frequency for a given binned frequency index.
Array index
Sound frequency
Returns the maximum FFT value within the given frequency range
Returns a binned array index for a given frequency
Array index into frequency bins
Returns a sub-sampling of frequency analysis data that falls between lowFreq and highFreq.
lowFreq
highFreq
Low frequency
High frequency
Full-spectrum frequency data
Sub-sampling of analysis
Helper for doing audio analysis. It takes case of connecting the audio stream, running in a loop and pause capability.
Provide a function which works with an AnalyserNode, and does something with the result.
Two helper functions provide ready-to-use Analysers:
Note: Browers won't allow microphone access unless the call has come from a user-interaction, eg pointerup event handler.