There really isn't a need for the following code as the music player doesn't eat any bandwidth, however I am sure it will be asked.
If you wish to only show the player to registered members then you can use the following code:
Code:
<!-- Music -->
<if condition="is_member_of($vbulletin->userinfo, 2, 3, 6, 7)">
<if condition="$userinfo[fieldM]">
<div id="$id" class="tborder content_block">
<h4 class="thead block_title">
<a href="#top" class="collapse_gadget" onclick="return toggle_collapse('$id')"><img id="collapseimg_$id" src="$stylevar[imgdir_button]/collapse_generic{$vbcollapse['collapseimg_'.$id]}.gif" alt="" border="0" /></a>
<a name="$id"></a>
<span class="block_name">Music</span>
</h4>
<div class="block_content" id="collapseobj_$id" style="{$vbcollapse['collapseobj_'.$id]}"><div class="alt1 smallfont block_row block_footer">
<p align="center">
<embed src="http://www.loudfusion.com/widgets/music/5" name="Music" quality="high" wmode="transparent" flashvars="USERID=$userinfo[fieldM]<if condition="$userinfo[fieldMP]">&FOLDERID=$userinfo[fieldMP]</if>" width="235" height="150" type="application/x-shockwave-flash"></embed>
</p>
</div></div>
</div>
</if>
</if>
<!-- / Music -->
You can change what groups are allowed to view the player by changing
2, 3, 6, 7 to the groups you want to allow. Just remember to set the fields up.
Note: If you have other groups besides Admins, Mods, and Members, be sure to add those groups.