AudioBuffer: sampleRate-Eigenschaft
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.
Die sampleRate
-Eigenschaft der AudioBuffer
-Schnittstelle gibt eine Gleitkommazahl zurück, die die Samplingrate, in Abtastungen pro Sekunde, der im Puffer gespeicherten PCM-Daten darstellt.
Wert
Ein Gleitkommawert, der die aktuelle Samplingrate der Pufferdaten in Abtastungen pro Sekunde angibt.
Beispiele
js
// Stereo
const channels = 2;
// Create an empty two second stereo buffer at the
// sample rate of the AudioContext
const frameCount = audioCtx.sampleRate * 2.0;
const myArrayBuffer = audioCtx.createBuffer(2, frameCount, audioCtx.sampleRate);
button.onclick = () => {
// Fill the buffer with white noise;
// just random values between -1.0 and 1.0
for (let channel = 0; channel < channels; channel++) {
// This gives us the actual ArrayBuffer that contains the data
const nowBuffering = myArrayBuffer.getChannelData(channel);
for (let i = 0; i < frameCount; i++) {
// Math.random() is in [0; 1.0]
// audio needs to be in [-1.0; 1.0]
nowBuffering[i] = Math.random() * 2 - 1;
}
}
console.log(myArrayBuffer.sampleRate);
};
Spezifikationen
Specification |
---|
Web Audio API # dom-audiobuffer-samplerate |
Browser-Kompatibilität
BCD tables only load in the browser