header('Content-type: audio/x-wav');
header('Content-Transfer-Encoding: binary');
header('Content-Length: '.mb_strlen($rawWave, '8bit'));
toFile("len.txt", strlen($rawWave)); // 95384
toFile("len2.txt", mb_strlen($rawWave, '8bit')); // 95384
echo base64_encode($rawWave);
$.ajax({
type: "POST",
..
success: function(data) {
var decodeWave = atob(data);
var len = decodeWave.length; // 71538
console.log(len);
Как то так ..