Convert buffer to file javascript. const arrayBuffer = new ArrayBuffer(buffer.

. Convert a file URL to an absolute path. readFile(), you can convert the buffer into the text from the file using . I have created a custom buffer builder which will build a node. length); Sep 7, 2023 · Converting a buffer to Base64 in JavaScript is a common operation when working with binary data, such as images or files, and you want to represent it as a text-based string. I have a JSON object and I'm converting it to a Buffer and doing some process here. Feb 11, 2020 · I don't have the reputation to add comment for @Ashish Modi's answer. js Sep 18, 2018 · 13. a buffer contains a pdf if the first bytes are [0x25, 0x50, 0x44, 0x46] you can simply test it like this : Nov 11, 2020 · The endpoint on my server actually gets the data from an external private endpoint and forwards it to my client. Get the absolute path of the current file. parse(buffer. If you are using Robotjs, check that its Bitmap object contains a Buffer to raw pixels data -- not a PNG or any other file format contents, just pixels next to each other (exactly 200 x 200 elements in your case). request to second server. So how to convert string back to buffer. record(); //let it record rec. js buffer module in the Node. Following is the new method I have tried, and it worked for me. name = fileName; return theBlob; } Below you can find the code to convert a base64 string into a Uint8Array copied from the docs. log (JSON. Try this I learned this from @nmaier when I was mucking around with converting to ico: Well i dont really understand what array buffer is but it does what we need: function previewFile(file) { var reader = new FileReader(); reader. const typedArray = new Uint8Array(myBuffer); const array = [typedArray]; answered Sep 18, 2018 at 17:44. 223. toString('base64') will convert the raw binary data in the buffer to a base64 representation of the data. To convert from a string to a Buffer object, use the static Buffer. Help me out please. I don't know that it makes any difference, but I am not "streaming" the files. Array buffers are used to keep binary data: images, PDFs, etc. This is example of converting String to a Buffer and back to String: let bufferOne = Buffer. js, we often use buffer to work with files which gives us much more flexibility with standard API. as i see here this function convert 'File' to 'ArrayBuffer'. js Buffer const blob = new Blob([buff]); // JavaScript Blob Old answer about how to transfer a Node. json file next to my index. Your response is byte array from your server application. stream(); The chunk size can be set by passing a number to Then I upload file to the server as a File. Here are a few of the most used techniques discussed with the help of JavaScript. createElement('a') link. converting buffer to string. Aug 12, 2018 · var offlineAudioCtx = new OfflineAudioContext({. May 14, 2024 · The readAsArrayBuffer () method of the FileReader interface is used to start reading the contents of a specified Blob or File. For binary-to-text encodings, the naming convention is reversed: Converting a Buffer into a string is typically referred to as encoding, and converting a string into a Buffer as decoding. 2. … Buffer instances are also Uint8Array instances. Compress and decompress data with DEFLATE. Dec 2, 2023 · Blob: arrayBuffer () method. Jun 2, 2021 · fs. Jul 25, 2018 · The Buffer class was introduced as part of the Node. Nov 29, 2016 · In my code i have this line: code reader. readAsArrayBuffer(document. Apr 14, 2016 · The fastest way to encode MP3 is using PNACL and the NACLPorts Lame but it's Chrome-only and non-trivial! Didn't test it myself, but according to the LameJS project, it supposed to run "20 times faster than realtime". Note: This feature is available in Web Workers. Jul 7, 2023 · AudioBuffer. js API to make it possible to interact with octet streams in the context of things like TCP streams and file system operations. Sep 14, 2015 · Yes, the file API does provide a way to convert your File, in the <input type="file"/> to a binary string, thanks to the FileReader Object and its method readAsBinaryString. var blob = new Blob(chunks, {. [ But don't use it in production ! Jul 3, 2020 · 0. You can also use the Response() constructor to convert a Blob to an ArrayBuffer. I've assumed you already know how to POST that string from the browser to your Nodejs server. js (e. // convert buff object to json const json = buff. I am working on a web app that opens binary files and allows them to be edited. When the read operation is finished, the readyState property becomes DONE, and the loadend event is triggered. log(reader. Then we’ll set its buffer property to the AudioBuffer. toString("base64") But what I get in return is this. read(buffer); const res = await Apr 19, 2021 · Here is a clean way to achieve the same in vanilla js: const response = await fetch(url); const buffer = await response. // push each chunk (blobs) in an array. parse(obj. js. Aug 1, 2021 · To convert a file input value to a byte array with JavaScript, we can convert the selected file into a byte array by creating an FileReader instance. currentTarget. A string representing the file name or the path to the file. var CustomBufferBuilder = function () { this Jul 24, 2023 · Learn how to write a buffer to a file in Node. – Feb 23, 2021 · Was also thinking of taking the buffer and writing the file with fs. I use an ubuntu host to send files to S3. } Nov 22, 2015 · If you must convert a file object to a blob object, you can create a new Blob object using the array buffer of the file. const encode = (data) => {. Download file on React js passed as byte Jul 5, 2020 · var processImageBuffer = new ArrayBuffer(image); // convert image to buffer array var blob = new Blob(image); // convert buffer array to promise array var processImageBuffer = blob. equals() returns true or false after comparison instead of 1, -1, and 0. ondataavailable = function(evt) {. from(url) let obj2 = obj. Before saving it to MongoDB when I log it as a base64 string again in the server side, I see my string is not the same as before. What I cannot handle is how to convert buffer to blob in NodeJS. If you want binary representation of individual bytes, you will need to call . lastModifiedDate = new Date (); theBlob. In order to read or write to an ArrayBuffer, you only need to create a view and copy across. You signed out in another tab or window. js Buffer via JSON: If you need to transfer a buffer of data through JSON, you can encode the buffer using a text-based encoding like hexadecimal or base64. The exact code is . concat(stdOut). toString() can also take other encodings, you can read more about the other supported encodings in the docs. Following is the code −In the code below, there are detailed explanations about the buffer. request(reqOptions, function(res) {. fileName. objectObject Jun 30, 2015 · Convert input=file to byte array. map() and toString() methodsusing JavaScript Array. when i get the image from the input i have to convert it to a buffer to make some operations with the image, so as a result a i have a buffer instead of file. arrayBuffer(); var processImageBuffer = arrayBufferToBuffer(processImageBuffer); // convert promise array to buffer Mar 8, 2019 · The problem you need to figure out is why is a buffer with that string being sent. href = window. onloadend = (evt) => {. toJSON (); For an example, let's say we have an array with some data like this, // data const data = [ 0x1, 0x2, 0x3, 0x4, 0x5 ]; Now let's convert this data to buffer using the from() method in the Buffer class. result)], {type: file. But also something that was likely making it not work, the OP is basically using reader. stop(); rec. This function converts a Blob into a File and it works great for me. Approaches to convert Integer array to String array:using JavaScript array. Buffer. toString('utf8'): Feb 16, 2015 · If you have a single Buffer you can use its toString method that will convert all or part of the binary contents to a string using a specific encoding. Does it really exists?" Do not have access to safari here, either. You will first need to convert the array buffer into a typed array, then from there you can use the spread operator to create an array. The first, let convert the buffer to string (in this case, we use base64 string) Then, return a simple html page to display base64 string image. readFile( filePath). It defaults to utf8 if you don't provide a parameter, but I've explicitly set the encoding in this example. toString('utf8')) Hmmmm I'm not sure why you guys are having problems. 0 of safari, Blob at 5. 22. js has both ArrayBuffer as part of v8, but the Buffer class provides a more flexible API. Body. Jul 15, 2015 · @KingWilder If you're using IE, you might need e. toString('utf-8'); But I don't want string version of it. onloadend = function () { console. on startup of your application) is not an issue, you can go with the synchronized version, which is as easy as: Feb 1, 2022 · 7. from() method - again optionally passing the encoding. Ideally as a file download with a specified file name. You cannot directly manipulate the contents of an ArrayBuffer; instead, you create one of the typed array objects or a DataView object which represents the buffer in a specific format, and use that to read and write the contents of the Oct 19, 2016 · How will I go about getting a Buffer object and converting it into JSON? This is what i have now: bufferToJson = buffer. Mar 11, 2016 · I had a very similar requirement (importing a base64 encoded image from an external xml import file. writeFile Convert buffer to readable string javascript. Mar 4, 2018 · I dont know if this will help but the last project I worked on we parsed a . With TypedArray now available, the Buffer class implements the Uint8Array API in a manner that is more optimized and suitable for Node. download = 'test. As I sidenote, why don't you just send the base64 string to the server over ajax and convert it to binary server-side, using PHP's base64_decode for example? Jul 10, 2018 · This function returns an Array Buffer. readAsArrayBuffer(changeEvent. This process is basically ondrop -> dataTransfer. Create the Blob object and download the file. js buffer by appending strings to it. If you have more questions about the code I can direct you to the person that worked on this file the most. Get the path to an executable bin file. Later I want to convert the same buffer data to convert to valid JSON object. 1. A função alloc() recebe o tamanho do buffer como primeiro e único argumento necessário. You need to use the audio context to convert the array buffer into an audio buffer. function blobToFile (theBlob, fileName) { //A Blob () is almost a File () - it's just missing the two properties below which we will add theBlob. text() method returns a Promise that resolves with a string containing the contents of the blob. uploadIt(e) {. Examplevar actualBufferObject = Buffer. You switched accounts on another tab or window. js May 1, 2017 · I'm trying to convert an AudioBuffer into a wav file that I can download. It's there if you're using Chrome. buffer parameter on the resulting Uint8Array to convert the underlaying ArrayBuffer to a different view if needed. this is a string!" // convert string to Buffer const buff = Buffer. mediaRecorder. let json = JSON. toString('utf-8')) 5 days ago · The ArrayBuffer object is used to represent a generic raw binary data buffer. On the private endpoint the file downloads and opens correctly. Below is the code I tried but I'm getting [object object] when I convert back to JSON and cannot open this object. The object scenario is simpler, if Buffer is a JSON string then you should simply be able to call JSON. Você verá o prompt começando com >. Once put into an AudioBuffer, the audio can then be played by being passed into an AudioBufferSourceNode. model. log(evt. key:'value', key:'value', May 15, 2020 · No Node. To get the ArrayBuffer version you just need to do uintArray. numberOfChannels: 2, length: 44100 * buffer. readAsArrayBuffer(file); } Jan 27, 2016 · You just need to add one extra line and it should work. const audioContext = new AudioContext(); const fileReader = new FileReader(); // Set up file reader on loaded end event. Buffers to the rescue! So, because it does not and can not know all these details, Node just reads the file byte for byte, without assuming anything about its contents. However, internally, file objects must be passed to other APIs. Jan 11, 2013 · Longer answer. From Buffer to ArrayBuffer: function toArrayBuffer(buffer) {. from (str, "utf-8" ); Nov 2, 2022 · The data to convert is on the data property, not the Buffer itself. Nov 1, 2016 · 12. 0; responseType "blob" and "arraybuffer" at XMLHttpRequest state Jun 11, 2024 · The task is to convert an integer array to a string array in JavaScript. Write Byte Array to a file JavaScript. Em seu terminal, digite o comando node: node. target. Vamos abrir o REPL do Node. The streamToBuffer Function: async function May 23, 2022 · Thank you for your answer! The written code appears to be for response to the client( FE ). Here is how to read a file as a buffer in Node. stringify(bufferOne); I am new to nodejs and am trying to set up a server where i get the exif information from an image. from([1, 2, 3]); // Node. Jul 11, 2018 · You signed in with another tab or window. import fs from 'fs/promises'; const filePath = 'path/to/file' // Promise-based code fs. I'm working on Node V6. type }); console. Learn from the experts how to use different methods, libraries and tools to solve this problem. from("hello world"); const blob = new Blob([buf]); const stream = blob. I'm mostly sure the private endpoint sends file type, but I don't know how to get the file type from the response and send it to my client. Aug 6, 2011 · You then of course use the . Jul 21, 2023 · When we work with file systems in Node. getElementById("files"). How these bytes should be interpreted is up to you as the developer. Sleep for a fixed number of milliseconds. The variable img is a string generated by canvas. I already tried to use methods like this in an attempt to get a base64 and so the image later: let base64String = new Buffer. js also supports the following binary-to-text encodings. Convert an absolute path to a file URL. Then you can turn it back to a string with toString() and use JSON. let url = 'something'. const blob = new Blob([array]); const reader = new FileReader(); Jul 14, 2022 · You can also create a buffer object with allocUnsafe() method, but the buffer created will be nonzero-filled. js para vermos isso. log(bufferOne); // Output: <Buffer 54 68 69 73 20 69 73 20 61 20 62 75 66 66 65 72 20 65 78 61 6d 70 6c 65 2e>. Apr 30, 2020 · A buffer is a space in memory (typically RAM) that stores binary data. ) in the same path to file object. // a string const str = "Hey. This example uses the built-in FileReader readDataURL () to do the conversion to base64 encoding. Here is how to write a buffer as a file in Node. See the example below. onloadend = () => {. How to create 31. Jun 22, 2022 · I have an email attachment file in buffer format I want to display and download the file in ReactJS. therefor i want to convert my 'String' to 'File' and then use this function above. toString(); bufferToJson = JSON. The data. My images are on S3 so I want to be able to just pass in the s3 url as a parameter and grab the i Nov 4, 2016 · im working on a javascript/nodejs application that needs to talk with a C++ tcp/udp socket. Any help will be appreciated. You'll usually want the default UTF-8 encoding, but it's possible to indicate a different encoding if needed. from(Photo, 'base64'); const { mime } = fileType(buffer); const photoBuffer = await jimp. js script: To stream the data in smaller chunks, first create a Blob instance from the Buffer. buffer. Note that strings here are encoded as UTF-8, unlike the usual JavaScript UTF-16 strings. Dec 22, 2011 · In older versions, node. At that time, the result property contains an ArrayBuffer representing the file's data. So the correct code looks like this: onSuccess(data) {. If blocking Node. writeFile('filename. log (The actual buffer object=); console. csv format, which would later be converted to JSON. click() Jun 3, 2020 · I'd like to convert an AudioBuffer to a Blob so that I can create an ObjectURL from it and then download the audio file. I have it working perfectly in firefox, but everything i try just doesn't work in May 3, 2011 · Here is a literal example of how to save canvas data to a file in Nodejs. I just want the buffer. Convert file object to array of objects. createBuffer(). 'base64': Base64 encoding. The package. then(fileBuffer => { // your logic here Dec 2, 2019 · The other option here is to save the contents of the buffer to a file and then let require do it's thing (not sure if that's an option for you). The proper way is that, we have to convert each string to buffer first and then create a new buffer by appending all these sub buffers. parse(bufferToJson) buffer is where the data is. It is an array of bytes, often referred to in other languages as a "byte array". js API to enable interaction with octet streams in TCP streams, file system operations, and other contexts. It seems like the sender of the buffer needs to call stringify or otherwise serialize the object before sending it. Davi Sonda Sonego. Data URLs are structured data:[<mediatype>][;base64],<data>, so we split that url at the comma and return only the base64 encoded characters. files[0] -> FileReader -> Uint8Array. var fileBuffer = Buffer. So for your above code you would use this to get your image as Nov 3, 2022 · assign the buffer to a variable, them use the method of the buffer to transfer to a JSON, something like this. Reload to refresh your session. }); const audioContext = new AudioContext() await audioContext. I had to convert the file into a Uint8Array before passing it to the Blob. – Jul 5, 2016 · @Kaiido "nor a browser that does support Blob objects (or File) but doesn't support the FileReader. dataURL2Blob has come from my plugin for image process, you can check out this link. toDataURL(). Here's an in-depth explanation with proper code examples and outputs: Oct 29, 2015 · You just have to make a new buffer with it. let buf = Buffer. . Create a new Blob object using the ArrayBuffer and specify the MIME type of the file you want to create. If you want to have the json object you can convert the string to json object by JSON. # Convert a Blob to an ArrayBuffer using the Response() constructor. @mlissner Downloading a file is not relevant to the current Question. Now what I'd like to be able to be to read the file contents from the Buffer, as this file will be in . let obj: Buffer = Buffer. Sep 1, 2020 · They return the complete content of the given file, but differ in their behavior (asynchronous versus synchronous). toString('utf-8') will convert it to plain string not to json object. js, usamos a função alloc() da class e Buffer para fazer isso. toJSON() answered Nov 3, 2022 at 20:46. And that's what the returned buffer is: an unopinionated container for the raw bytes in the file. return Buffer. Sep 19, 2020 · How to convert a String to Buffer and vice versa in Node. There doesn't seem to be any standard Apr 16, 2021 · I would like to convert this return to an image. //console. stream() method to create a ReadableStream that streams the data in chunks of a specified size. The Blob. I use code like this to upload MP4 files which I can download and play again. I fully download them and play them-- but I don't think that would make any difference. g. files[0]); code and then i send it to a function that get 'ArrayBuffer'. After using xml2json-light library to convert to a json object, I was able to leverage insight from cuixiping's answer above to convert the incoming b64 encoded image to a file object. Feb 24, 2013 · I've wanted to show the user the audio controls, thus I needed a solution for the question asked. The Buffer class was introduced as part of the Node. toString('base64'); return base64. Vanilla JavaScript. result); //this is an ArrayBuffer } reader. 9. This is the AudioBufferSourceNode of the audio we’ll be processing. In Node. An example of what buffer can be is {cmd:'echo'} I have tried bufferToJson. duration, sampleRate: 44100, }); Next, we’ll create a buffer source for the OfflineAudioContext. URL. What I want is convert to an image(png/jpg. toString(2) on each numeric byte value (something you can do without converting the Buffer to a string first). I feel like while converting the base64 to file in the client side I am doing something wrong. Jan 31, 2017 · 186. from(data); let base64 = buf. I need the string contents of the files to perform the conversion. pdf'. The arrayBuffer() method of the Blob interface returns a Promise that resolves with the contents of the blob as binary data contained in an ArrayBuffer . log(bytes); answered Oct 30, 2023 at 12:23. log(blob); Sep 23, 2020 · To convert a Buffer to JSON, you can use the toJSON() method in the Buffer instance. May 10, 2017 · Note: I am editing my answer according to your last edits. forEach() and String Jan 20, 2021 · 3. Oct 25, 2023 · In this article, we’ll dive into a JavaScript function that converts streams into buffers and discuss how to use it effectively in your projects. stringify(bufferToJson) bufferToJson = JSON. fileReader. srcElement instead. decodeAudioData(arrayBuffer, (audioBuffer) => {. data as Buffer], { type: 'application/pdf' }) const link = document. Unlike arrays, you cannot change the size of a buffer once it is created. files[0]; const buff = Buffer. from(file, 'base64') If the file is actually on disk, this is even easier, since, by default, the fs. 1 Reading ArrayBuffer from Blob has wrong data. js, we can access these spaces of memory with the built-in Buffer class. arrayBuffer(); const bytes = new Uint8Array(buffer); console. – Do you have a Base64 string and do not know how to convert it to PDF using JavaScript? Do not worry! I am here to help you. var blob=new Blob([bytes], {type: "application/pdf"});// change resultByte to bytes. Assume I have two servers both run on NodeJS. pdf', buffer); Also, the solution to your question already exist here : Detecting file type from buffer in node js? please take time to find already existing solutions on stack overflow before posting. Check if the current file is the entrypoint Feb 28, 2020 · How to convert buffer data to an image in javascript? This question has been asked and answered on Stack Overflow, the largest and most trusted online community for developers. First receive a file using Multer and convert it to buffer as output, then convert it to blob and put it to form-data and post it via NodeJS https. Buffers store a sequence of integers, similar to an array in JavaScript. To convert a string to a Buffer, you can use the from() method from the global Buffer class in Node. Actually you just need to convert the ArrayBuffer to a Blob, get an URL for it and map this to the <audio> element's src attribute: const blob = new Blob([arrayBuffer], { type: "audio/wav" }); const url = window. Jan 25, 2022 · I am trying to create an excel file that is downloadable from both Firefox and Chrome from an Angular 2+ environment. js and find out how to convert a buffer to a wav file yourself. I will show you some practical examples how to decode Base64 to PDF using the atob function and get some information about it. Nov 27, 2020 · I am resizing base64 image with jimp: const buffer = Buffer. The toString() function lets you convert buffers into meaningful strings depending on encoding. wav file using the Node buffer API and wrote it using the Node file API. const blob = new Blob([new Uint8Array(e. Pure JavaScript, while great with Unicode encoded strings, does not handle straight binary data very well. Compress and decompress data with gzip. 3. readFile operation returns a buffer. Looking over the code it seems to utilize JavaScript's Float32Array. As of March 2024, utility consumers provide the following functions to consume streams: arrayBuffer, blob, buffer, json, text. I didn't found a solution right now to convert it to a readable string and the other direction seems to be the same problem. from(result). It seems like I get from the old C++ clients an utf16 buffer. files[0]);, which didn't originally get addressed, here, and will alter what e is. createObjectURL(blob); Apr 20, 2019 · The file gets uploaded successfully, and the file metadata becomes accessible in the req object of ExpressJS. May 25, 2016 · I am using a library which on call of a function returns the toString of a buffer. // How to I now convert the AudioBuffer into an ArrayBuffer In a nutshell, it's easy to convert a Buffer object to a string using the toString() method. Nov 10, 2020 · How do I receive this binary data on the client side as a downloadable file? It can be a pdf that can be downloaded or something like an image which has to be displayed in the browser on the website (as part of the website). cmd and only get undefine. 0 Javascript file reader does not get stored in array. Mar 21, 2014 · var rec = new Recorder(yourSourceObject); rec. For instance, if we have the following HTML: Then we can write: reader. If you want to compare buffer objects, the Buffer. var req = http. JavaScript provides a built-in method for this purpose called btoa() for encoding binary data as Base64. const blob = new Blob([data. exportWAV(function(blob){ //the generated blob contains the wav file }]) You can also check out the source code of recorderWorker. The AudioBuffer interface represents a short audio asset residing in memory, created from an audio file using the AudioContext. You can read more about the Node. The file can be renamed at Save File prompt or at local filesystem after downloading the file. Here is a code example. im using FileCollection in meteor to store the image in mongo collection. Join the discussion and share your own insights and solutions. Sep 14, 2020 · Convert buffer to readable string in JavaScript - For this, use the concept of toString (‘utf8’). For example, if you read an ordinary text file using fs. Jul 28, 2011 · If you need to send it over ajax, then there's no need to use a File object, only Blob and FormData objects are needed. Just make sure that the characters in the string adhere to the encoding schema, for example, if you use characters outside the UTF-8 range in the example they will be encoded to two bytes instead of one. parse() on the string. In addition, I’ll show how to embed PDF into HTML page and create a link to download the PDF. Rob Brander. Node. According to MDN browser compatibility, <input type="file"> is supported at version 1. e. Create a new File object using the Blob and provide a filename for the file. const buf = Buffer. Something like if Mar 7, 2019 · 15. download attribute value at <a> element only provides a suggestion for the file name at offer of file for download. createObjectURL(blob) link. The accepted answer is great but only gives an array buffer which is not an audio buffer. stringify Jul 7, 2023 · AudioBuffer. The dataTYPE is embedded in dataURI and hence should be parsed as in the first answer. 1, FileReader at 6. link. Aug 28, 2012 · return new Blob([new Uint8Array(array)], {type: dataTYPE}); input dataURI is Data URL and dataTYPE is the file type and then output blob object. I tried 2 methods: The first one, I record all the sounds going threw a mediaRecorder and do this: App. var obj = {. Apr 4, 2024 · We used the new Blob() constructor to convert the ArrayBuffer to a Blob. from('This is a buffer example. readAsArrayBuffer(new Blob([input[0]])); when it should've been reader. Follow the function will convert a buffer to a string. 1. const arrayBuffer = new ArrayBuffer(buffer. Dec 2, 2023 · An iterable object such as an Array, having ArrayBuffer s, TypedArray s, DataView s, Blob s, strings, or a mix of any of such elements, that will be put inside the File . var bytes = new Uint8Array(resultByte); // pass your byte response to this constructor. Since you’re receiving a Buffer back as output, Buffer. type: 'audio/mp3'. First of all, what is a Blob? Let the Jan 22, 2020 · 1. data) Feb 21, 2020 · Buffers have a toString() function that takes a single argument encoding. '); console. Then use the Blob. join() and split() methodsusing JavaScript Array. compare() method is a good fit for you, but buf. from(file) If your encoding is NOT utf8 you can specify an alternate encoding as a second optional argument. Dec 27, 2015 · Binary here means individual bytes. preventDefault(); var reader = new FileReader(); var buffer; var file = e. readAsArrayBuffer(e. Note that the function below returns a Uint8Array. files[0]); reader. 0. js's built-in Buffer is an important module when working with a file system. Sep 11, 2023 · To convert an ArrayBuffer to a File object in JavaScript, you can follow these steps: 1. Essentially, I want to be able to save the modified file back as a binary file. from (' [John Smith]', 'utf8') console. decodeAudioData() method, or from raw data using AudioContext. ih xm ic we if ua fz qr qe za