// show file id
echo $f_id = $blob['file_id'];
echo "<a href='$blob_wav'><b style='color:white'>sss</b></a>";

<?php

    $dbHost = 'localhost';
    $dbUsername = 'root';
    $dbPassword = '';
    $dbName = 'store';

    //Create connection and select DB
    $db = new mysqli($dbHost, $dbUsername, $dbPassword, $dbName);

    //Check connection
    if($db->connect_error){
       die("Connection failed: " . $db->connect_error);
    }


    $result = $db->query("SELECT data FROM content");

    if($result->num_rows > 0){
        $blob = $result->fetch_assoc();
        $blob_wav = $blob['data'];

// show file id
        //echo $f_id = $blob['file_id'];

        header("Content-type: audio/wav");

      //echo "<a href='$blob_wav'><b style='color:white'>sss</b></a>";

       echo $blob_wav;
    }else{
        echo 'blob .wav files not found...';
    }
?>