Nothing really complex here.
The page is a frameset, with a thin horizontal non-scrolling bar at the bottom named playsong.php called "_console" by the frameset.
There are links up above in the main part of the page like:
<A href="playsong.php?trackID=1&albumID=137" target="_console">click me for song 1 of album 137</a>
So that tells the horizontal bar at the bottom to reload playsong.php with the parameters trackID and albumID.
You can retrieve trackID and albumID with $GET['trackID'] and $GET['albumID'].
In this case, we'll have HTML and only "escape" out of the HTML long enough to grab the albumID and trackID and insert them with echo();
playsong.php?trackID=4&albumID=918
would play back song "/musik/918_4.rm".
The gist of the code in playsong.php is:
<html>
<title>Song Playback Console</title>
<body leftmargin=0 topmargin=0 marginwidth=0 marginheight=0>
<embed src="/muzik/"<?php echo $_GET['albumID']; ?>_<?php echo $_GET['trackID']; ?>.rm"
controls="ControlPanel"
autostart="TRUE"
loop="FALSE"
volume=100%
width=225
height=25>
</embed>
</body>
</title>
</html>
