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AudioBuffer.getChannelData() - Web APIs | MDN
https://developer.mozilla.org/en-US/docs/Web/API/AudioBuffer/getChannelData
The channel property is an index representing the particular channel to get data for. An index value of 0 represents the first channel. If the channel index value is greater than of equal to AudioBuffer.numberOfChannels, an INDEX_SIZE_ERR exception will be thrown. Return value A Float32Array. Example
javascript - Is AudioContext / getChannelData ...
https://stackoverflow.com/questions/64479064/is-audiocontext-getchanneldata-deterministic
To answer your original question: getChannelData is deterministic, i.e. it will yield the same Float32Array from the same AudioBuffer for the same channel (unless you happen to transfer the backing ArrayBuffer to another thread, in which case it will return an empty Float32Array with a detached backing buffer from then on).
AudioBuffer.getChannelData - Web APIs - W3cubDocs
https://docs.w3cub.com/dom/audiobuffer/getchanneldata.html
The channel property is an index representing the particular channel to get data for. An index value of 0 represents the first channel. If the channel index value is greater than of equal to AudioBuffer.numberOfChannels, an INDEX_SIZE_ERR exception will be thrown. Return value A Float32Array. Example
AudioContext - Web APIs | MDN - Mozilla
https://developer.mozilla.org/en-US/docs/Web/API/AudioContext
The AudioContext interface represents an audio-processing graph built from audio modules linked together, each represented by an AudioNode.. An audio context controls both the creation of the nodes it contains and the execution of the audio processing, or decoding. You need to create an AudioContext before you do anything else, as everything happens inside a context.
How do I get buffers/raw data from AudioContext?
https://stackoverflow.com/questions/53589970/how-do-i-get-buffers-raw-data-from-audiocontext
e.inputBuffer.getChannelData(0) Where 0 is the first channel. This should return a Float32Array with the raw PCM data, which you can then convert to an ArrayBuffer e.inputBuffer.getChannelData(0).buffer and send to a worker that would convert it …
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