webkitaudiocontext

webkitAudioContext createMediaElementSource on iOS Safari not working

由 北战南征 提交于 2020-05-10 04:07:07
问题 I want to do a live sound analysis on the iPhone. Therefor I use the webkitAudioContext Analyser. var ctx = new (window.AudioContext || window.webkitAudioContext); var audioGoodmorning = new Audio('assets/sounds/greeting.m4a'); var audioSrc = ctx.createMediaElementSource(audioGoodmorning); var analyser = ctx.createAnalyser(); analyser.fftSize = 32; audioSrc.connect(analyser); audioSrc.connect(ctx.destination); var frequencyData = new Uint8Array(analyser.fftSize); analyser.getByteFrequencyData

AudioContext on Safari

由 孤者浪人 提交于 2020-05-07 18:17:19
问题 Yesterday, I had a question about the noteOn method of the AudioContext object. I've gotten myself all turned around now on this AudioContext object. Here's what I've tried and their associated error messages in Safari on my desktop: var ctx // ctx = new(AudioContext || webkitAudioContext); // ReferenceError: Can't find variable: AudioContext // ctx = new(audioContext || webkitAudioContext); // ReferenceError: Can't find variable: audioContext // ctx = new(window.AudioContext ||

HTML5 Audio API - “audio resources unavailable for AudioContext construction”

由 放肆的年华 提交于 2020-01-24 17:14:40
问题 I'm trying to create a graphic equalizer type visualization for HTML5 audio - Chrome only at this point, using webkitAudioContext. I'm finding unusual and unpredictable behaviour when I try to change the source of the audio i.e. to play a different song. I read somewhere I should wait until the "canplay" event on the audio is triggered before connecting it to the context / analyser: var context, sourceNode, analyser, javascriptNode, audio; var ctx = $("#songcanvas").get()[0].getContext("2d");

HTML5 Audio API - “audio resources unavailable for AudioContext construction”

由 丶灬走出姿态 提交于 2020-01-24 17:14:05
问题 I'm trying to create a graphic equalizer type visualization for HTML5 audio - Chrome only at this point, using webkitAudioContext. I'm finding unusual and unpredictable behaviour when I try to change the source of the audio i.e. to play a different song. I read somewhere I should wait until the "canplay" event on the audio is triggered before connecting it to the context / analyser: var context, sourceNode, analyser, javascriptNode, audio; var ctx = $("#songcanvas").get()[0].getContext("2d");

Record sound of a webaudio api's audio context

由 痞子三分冷 提交于 2019-12-25 07:08:33
问题 I am using web audio api in my project. Is there a way to record the audio data that's being sent to webkitAudioContext.destination? .wav files are playing in my browser, so there should be some way to store that data into a (.wav) file . i know this is possible, but not yet find any solution :( recorder.js can help me, but upto now i found it is only recording the microphone live input, is it possible to record my audio(.wav files) with the help of recorder.js? plz help i am using this

OfflineAudioContext and FFT in Safari

由 社会主义新天地 提交于 2019-12-10 18:28:01
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

HTML5 Audio Buffer getting stuck

由 蓝咒 提交于 2019-12-06 07:09:42
问题 I'm using the HTML5 webkitAudioContext to get the realtime levels of a user's microphone using this following code: var liveSource; function getLevel(){ var context = new webkitAudioContext(); navigator.webkitGetUserMedia({audio: true}, function(stream) { liveSource = context.createMediaStreamSource(stream); liveSource.connect(context.destination); var levelChecker = context.createJavaScriptNode(4096, 1 ,1); liveSource.connect(levelChecker); levelChecker.connect(context.destination);

Record Sounds from AudioContext (Web Audio API)

由 半腔热情 提交于 2019-12-06 02:23:34
问题 Is there a way to record the audio data that's being sent to webkitAudioContext.destination ? The data that the nodes are sending there is being played by the browser, so there should be some way to store that data into a (.wav) file. 回答1: Currently, there's not a native way to do that, but as Max said in the comment above, Recorderjs does essentially this (it doesn't chain onto the destination, but is a ScriptProcessorNode you can connect other nodes to, and have its input recorded. I built

HTML5 Audio Buffer getting stuck

由 怎甘沉沦 提交于 2019-12-04 13:38:25
I'm using the HTML5 webkitAudioContext to get the realtime levels of a user's microphone using this following code: var liveSource; function getLevel(){ var context = new webkitAudioContext(); navigator.webkitGetUserMedia({audio: true}, function(stream) { liveSource = context.createMediaStreamSource(stream); liveSource.connect(context.destination); var levelChecker = context.createJavaScriptNode(4096, 1 ,1); liveSource.connect(levelChecker); levelChecker.connect(context.destination); levelChecker.onaudioprocess = function(e) { var buffer = e.inputBuffer.getChannelData(0); var maxVal = 0; //

Record Sounds from AudioContext (Web Audio API)

由 丶灬走出姿态 提交于 2019-12-04 06:52:25
Is there a way to record the audio data that's being sent to webkitAudioContext.destination ? The data that the nodes are sending there is being played by the browser, so there should be some way to store that data into a (.wav) file. Currently, there's not a native way to do that, but as Max said in the comment above, Recorderjs does essentially this (it doesn't chain onto the destination, but is a ScriptProcessorNode you can connect other nodes to, and have its input recorded. I built on Recorderjs to do a simple audio file recorder - https://github.com/cwilso/AudioRecorder . Sine to opus
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