audiocontext

问题 I have the following very basic code which is part of a more complex problem. My problem here is the function: context.decodeAudioData(arrayBuffer) is not working on iPhone (tried on Safari and Chrome ) nor Mac (Safari), but it works everywhere else ( Android and Windows 10 (all browsers). Even it works on Mac (Chrome). On Mac (Safari) I get the following error: Unhandled Promise Rejection: TypeError: Not enough arguments Here is the code: window.AudioContext = window.AudioContext || window

问题 See related question: Navigator.mediaDevices.getUserMedia not working on iOS 12 Safari We are trying to capture audio from user input user MediaDevices.getUserMedia and Audio Context When the user clicks a button we check for available devices and then we capture their audio stream let enumDevicePromise = navigator.mediaDevices.enumerateDevices() .then(devices => devices.find(d => d.kind === "audioinput" && d.label !== "" && d.deviceId === "default")) .catch((error) => { // handle error });

问题 var context = new window.AudioContext() var request = cc.loader.getXMLHttpRequest(); request.open("GET", 'res/raw-assets/resources/audio/bgm.mp3', true); request.responseType = "arraybuffer"; request.onload = function () { context["decodeAudioData"](request.response, function(buffer){ //success cc.log('success') window.buffer = buffer playBgm() }, function(){ //error }); }; request.onerror = function(){ //error }; request.send(); function playBgm(){ var audio = context["createBufferSource"]()

问题 We are facing problem to draw the audio visualization (graph) by wavesurfer JS in Firefox for some specific format of the mp3 file. It always gives us the error like: The buffer passed to decodeAudioData contains an unknown content type. But same file is running in chrome without any problem. After the investigation, we have found that decodeAudioData() is used in wavesurfer JS which is generating the error while decoding audio file data contained in an ArrayBuffer. Since we don't have an

问题 I have setup example here - http://jsbin.com/hotovu/2/ On desktop chrome all is good. Android Chrome 39 returns all the arrays to 0,0,0, ... ( on ADB plugin for chrome debug ) Any workaround to make this work ? 回答1: This is a known bug. http://crbug.com/419446. It's not the Analyser, it's the media element. If you can load it with XHR into a buffer and play it, it will work. 来源： https://stackoverflow.com/questions/27552704/android-chrome-39-getbytefrequencydata-returns-0-array

问题 i am trying to implement microsoft bing speech api and its working fine for the first 5 times after that when i record my voice i getting exception in console . Exception : Uncaught DOMException: Failed to construct 'AudioContext': The number of hardware contexts provided (6) is greater than or equal to the maximum bound (6). when i try to close with AudioContext.close() it shows another error like "Uncaught (in promise) DOMException: Cannot close a context that is being closed or has already

问题 Scenario: Audio starts playing from 0:00 . At exactly 0:05 , the track skips forwards to 0:30 . The track immediately starts playing at 0:30 , and at exactly 0:35 , the track skips backwards to 0:05 and plays the rest of the audio file Summary: Play: 0:00 to 0.05 , Skip: 0:05 to 0:30 , Play: 0:30 to 0:35 , Skip: 0:35 to 0:05 , Play: 0.05 to END The real problem comes when there is the need for a immediate and seamless skip. For example, setTimeout is very inaccurate and drifts meaning it

问题 I am using OfflineAudioContext to do waveform analysis in the background. All works fine in Chrome, Firefox and Opera but in Safari I get a very dodgy behaviour. The waveform should be composed by many samples (329), but in Safari the samples are only ~38. window.AudioContext = window.AudioContext || window.webkitAudioContext; window.OfflineAudioContext = window.OfflineAudioContext || window.webkitOfflineAudioContext; const sharedAudioContext = new AudioContext(); const audioURL = 'https://s3

问题 EDIT 2: solved. See answer below. EDIT 1: I changed my code a little, added a gain node, moved a function. I also found that IF I use the microphone, it will work. Still doesn't work with usb audio input. Any idea? This is my current code: window.AudioContext = window.AudioContext || window.webkitAudioContext; window.onload = function(){ var audioContext = new AudioContext(); var analyser = audioContext.createAnalyser(); var gainNode = audioContext.createGain(); navigator.mediaDevices

问题 On the following url: https://www.tophtml.com/snl/15.mp3 there is one audio I want to play using pure Web Audio API on the following range : range from: second: 306.6 range to: second: 311.8 total: 5.2 seconds I downloaded that file to my desktop (I'm using Windows 10 ), then opened it with VLC and got the following file info: number of channels: 2 sample rate: 44100 Hz bits per sample: 32 (float32) Here you have info about concepts on this: https://developer.mozilla.org/en-US/docs/Web/API