Merge two mp3 php

Question

Do you know a class to merge two MP3 files using PHP?

I\'ve found nothing on Google.

Answer 1

Important things to remember:

• The bit rates must match. It's also a good idea to ensure the rate (Hz) and stereo/mono are matched (I used Audacity).
• The Content-length header be the length of both files.

Here's a sample from my text-to-speech project. I needed to add a 1 second silence at the end of MP3 audio that was generated dynamically:

$output_audio = textToMP3("Hello World");               // Original audio
$silent_audio = file_get_contents("silence.mp3");       // 1 second silence
$content_length = strlen($output_audio) + strlen($silent_audio);

// Output the audio stream
header('Content-type: audio/mpeg');
header('Content-length: ' . $content_length);
header('Cache-Control: no-cache');
header("Pragma: no-cache");
header("Expires: 0");
echo $audio . $silent_audio;