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AnalyserNode.maxDecibels

The maxDecibels property of the AnalyserNode interface Is a double value representing the maximum power value in the scaling range for the FFT analysis data, for conversion to unsigned byte/float values — basically, this specifies the maximum value for the range of results when using getFloatFrequencyData() or getByteFrequencyData().
AnalyserNode API maxDecibels Property Reference Référence Web Audio API

AnalyserNode.minDecibels

The minDecibels property of the AnalyserNode interface Is a double value representing the minimum power value in the scaling range for the FFT analysis data, for conversion to unsigned byte/float values — basically, this specifies the minimum value for the range of results when using getFloatFrequencyData() or getByteFrequencyData().
AnalyserNode API minDecibels Property Reference Référence Web Audio API

AnalyserNode.smoothingTimeConstant

The smoothingTimeConstant property of the AnalyserNode interface is a double value representing the averaging constant with the last analysis frame. It's basically an average
between the current buffer and the last buffer the AnalyserNode processed, and results in a much smoother set of value changes over time.
AnalyserNode API Property Reference Référence smoothingTimeConstant Web Audio API

AudioBuffer

Objects of these types are designed to hold small audio snippets, typically less than 45 s. For longer sounds, objects implementing the MediaElementAudioSourceNode are more suitable. The buffer contains data in the following format:  non-interleaved IEEE754 32-bit linear PCM with a nominal range between -1 and +1, that is, 32bits floating point buffer, with each samples between -1.0 and 1.0. If the AudioBuffer has multiple channels, they are stored in separate buffer.
API AudioBuffer Interface Reference Référence Web Audio API

AudioBufferSourceNode.detune

The detune property of the AudioBufferSourceNode interface is an k-rate AudioParam representing detuning of oscillation in cents.
API AudioBufferSourceNode detune Property Reference Référence Web Audio API

AudioBufferSourceNode.playbackRate

The default value is 1.0. When set to another value, the AudioBufferSourceNode resamples the audio before sending it to the output.
API AudioBufferSourceNode playbackRate Property Reference Référence Web Audio API

AudioBufferSourceNode.start()

The most simple example just starts the audio buffer playing from the beginning — you don't need to specify any parameters in this case:
API AudioBufferSourceNode Method Reference Référence start Web Audio API

AudioBufferSourceNode.stop()

The most simple example just stops the audio buffer playing immediately — you don't need to specify any parameters in this case:
API AudioBufferSourceNode Method Reference Référence stop Web Audio API

AudioContext.close()

The close() method of the AudioContext Interface closes the audio context, releasing any system audio resources that it uses.
API AudioContext close Media Method Reference Référence Web Audio API