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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.
If you don't want to convert files to such specific formats, you can use AUKit's austream, which allows you to play any type of WAV, DFPWM, AIFF, AU, or FLAC file. Just download the aukit.lua and austream.lua files to the computer, and then use austream to play it.
If you just want to play audio from a command without writing code, you can use the speaker command to play DFPWM or 8-bit 48kHz WAV audio from a file or URL. You can get DFPWM files through https://remote.craftos-pc.cc/music/, https://music.madefor.cc (limit of ~1 minute of audio if you're on a server and use drag-and-drop uploading), or Audacity with FFmpeg 5.1 installed.