If You wish to remove stop button, slider and volume control from the Commedia, You should to open plugins/content/commedia/commedia.php and cut out of that file:
line 735:
document.getElementById("playerslider"+si).style.display = "";
lines 1692-1709:
echo '<script type="text/javascript">
/*<![CDATA[*/
'.$jqp.'(document).ready(function() {
'.$jqp.'("#playercontroller'.$mp3count.'").bind("mousedown", function(pEvent) {
var startX = _findPosX(document.getElementById("timeline'.$mp3count.'"));
var x = _xmouse(pEvent);
if (x < (startX + '.($plstwdt*2).')) {
return;
} else {
var position = Math.round('.($seconds>0?$seconds:$jqp.'("#jplayer'.$mp3count.'").data("jPlayer").status.duration').' * (((x - startX - '.($plstwdt*2).') / timelineWidth'.$commcount.')));
}
play('.$mp3count.',position);
});
});
/*]]>*/
';
echo '</script>';
lines 1801-1819:
<div class="mp3button stop" title="'.JTEXT::_('Stop').'"><div onclick="stop('.$mp3count.','.(($_radio)?'true':'false').')">STOP</div></div>
<div class="timeline" id="timeline'.$mp3count.'"><div style="display: none;" id="playerslider'.$mp3count.'" class="slider">SLIDER</div></div>
</div><div class="volcontainer">
<div id="vol0_'.$mp3count.'" class="vol0"><div onclick="setVolume('.$mp3count.',0)"></div></div>
<div id="_vol0_'.$mp3count.'" class="_vol0"><div onclick="setVolume('.$mp3count.',0)"></div></div>
<div id="vol1_'.$mp3count.'" class="vol1"><div onclick="setVolume('.$mp3count.',1)"></div></div>
<div id="_vol1_'.$mp3count.'" class="_vol1"><div onclick="setVolume('.$mp3count.',1)"></div></div>
<div id="vol2_'.$mp3count.'" class="vol2"><div onclick="setVolume('.$mp3count.',2)"></div></div>
<div id="_vol2_'.$mp3count.'" class="_vol2"><div onclick="setVolume('.$mp3count.',2)"></div></div>
<div id="vol3_'.$mp3count.'" class="vol3"><div onclick="setVolume('.$mp3count.',3)"></div></div>
<div id="_vol3_'.$mp3count.'" class="_vol3"><div onclick="setVolume('.$mp3count.',3)"></div></div>
<div id="vol4_'.$mp3count.'" class="vol4"><div onclick="setVolume('.$mp3count.',4)"></div></div>
<div id="_vol4_'.$mp3count.'" class="_vol4"><div onclick="setVolume('.$mp3count.',4)"></div></div>
<div id="vol5_'.$mp3count.'" class="vol5"><div onclick="setVolume('.$mp3count.',5)"></div></div>
<div id="_vol5_'.$mp3count.'" class="_vol5"><div onclick="setVolume('.$mp3count.',5)"></div></div>
<div id="vol6_'.$mp3count.'" class="vol6"><div onclick="setVolume('.$mp3count.',6)"></div></div>
<div id="_vol6_'.$mp3count.'" class="_vol6"><div onclick="setVolume('.$mp3count.',6)"></div></div>
<div id="vol7_'.$mp3count.'" class="vol7"><div onclick="setVolume('.$mp3count.',7)"></div></div>
<div id="_vol7_'.$mp3count.'" class="_vol7"><div onclick="setVolume('.$mp3count.',7)"></div></div>
Also You need to change lines 1797-1798:
$html.='<div class="playercontainer" style="width: '.($playWidth+48+4+(($showRepeat>=1)?20:0)+($showPop?20:0)+($showSoc?20:0)).'px;">
<div id="playercontroller'.$mp3count.'" class="playercontroller" style="width: '.$playWidth.'px;">
to
$html.='<div class="playercontainer" style="width:20px;">
<div id="playercontroller'.$mp3count.'" class="playercontroller" style="width: 0px;">
because Your image for play button has width value of 20px.
Hope it will be usefull to You.