Convert from PCM to WAV. Is it Possible?

Question

I have an application for iPAD. This application records the voice of the microphone. The audio formats of the item must be PCM, MP3 and WAV files. The MP3 file I get it sta

Answer 1

I was working on a system where it accepts only wav files, but the one I was receiving from amazon Polly was pcm, so finally did this and got my issue resolved. Hope it helps someone. This is an example of nodejs.

    // https://github.com/TooTallNate/node-wav
    const FileWriter = require('wav').FileWriter
    
    let audioStream = bufferToStream(res.AudioStream);
    var outputFileStream = new FileWriter(`${outputFileFolder}/wav/${outputFileName}.wav`, {
                                sampleRate: 8000,
                                channels: 1
                            });
    audioStream.pipe(outputFileStream);
    
    function bufferToStream(binary) {
        const readableInstanceStream = new Stream.Readable({
            read() {
                this.push(binary);
                this.push(null);
            }
        });
        return readableInstanceStream;
    }