How to upload the audio file using php - php

Question

i wanted to upload the mp3 file to the related folder name /uploads/ inside my project folder. But something not working correctly in php. Image file are uploading without any error but when i tried to upload the mp3 file its not working.
Here is my html form
<form action="act_songs.php" method="post" enctype="multipart/form-data">
<?php
if (isset($_SESSION['msg'])) {
echo $_SESSION['msg'];
unset($_SESSION['msg']);
}
?>
<p>
<label>Song Title</label>
<input type="text" name="sng-title">
</p>
<p>
<label>Song Name</label>
<input type="file" name="mp3" accept="audio/*" runat="server">
</p>
<p>
<input type="submit" name="add-song" value="ADD">
</p>
</form>
And here is my php code
if (isset($_POST['add-song'])) {
$title = $_POST['sng-title'];
$audio = $_FILES['mp3']['name'];
$audio_type = $_FILES['mp3']['type'];
$audio_size = $_FILES['mp3']['size'];
$tmp_location = $_FILES['mp3']['tmp_name'];
$audio_url = "../uploads/".$audio;
if ($type == '.mp3' || $type == '.wav') {
if ($size <= 5000) {
move_uploaded_file($tmp_location, $audio_url);
}
}
if (!empty($title)) {
$sql = "insert into `tbl_songs` (`title`,`songs`) values ('$title','$audio_url')";
$sql_run = mysql_query($sql);
if ($sql_run) {
$_SESSION['msg'] = "<div class='alert'>Record Saved</div>";
header('location:songs.php');
}
else{
$_SESSION['msg'] = "<div class='alert'>Record Cannot Saved</div>";
header('location:add-songs.php?invalid');
}
}
else{
$_SESSION['msg'] = "<div class='alert'>Title Must be requiired.</div>";
header('location:add-songs.php?invalid');
}
}
What is the problem i am unable to debug the problem. If anybody have solution then place your answer