node base64 to audio

To convert a base64 encoded string to an audio file in Node.js, you can follow these steps:

1. Decode the base64 string to a buffer using the Buffer class provided by Node.js.
2. Write the buffer to a file using the fs (File System) module.
3. Use a library such as fluent-ffmpeg to convert the saved file to the desired audio format, such as MP3 or WAV.

That's it!