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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
const channels = [ new Float32Array(441), new Float32Array(441), ]; for (let i = 0, j = 0, n = 1; i < int16.length; i++) { const int = int16[i]; // If the high bit is on, then it is a negative number, and actually counts backwards. const float = int >= 0x8000 ? -(0x10000 - int) / 0x8000 : int / 0x7fff; // Deinterleave channels[(n = ++n % 2)][!n ? j++ : j - 1] = float; } // https://github.com/zhuker/lamejs/commit/e18447fefc4b581e33a89bd6a51a4fbf1b3e1660 const left = channels.shift(); const right = channels.shift(); let leftChannel, rightChannel; if (this.mimeType.includes('mp3')) { const sampleBlockSize = 441; leftChannel = new Int32Array(left.length); rightChannel = new Int32Array(right.length); for (let i = 0; i < left.length; i++) { leftChannel[i] = left[i] < 0 ? left[i] * 32768 : left[i] * 32767; rightChannel[i] = right[i] < 0 ? right[i] * 32768 : right[i] * 32767; } }