I have found solution with some JavaScript for hHTML audio but still no luck with flash player. Here is the code for HTML player:
Put this into header.php:
<script type="text/javascript">
var iframe = parent.document.getElementById('iframe_play');
var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;
var song = innerDoc.getElementById('audio');
<?php if($post->ID == 384): ?>
song.pause();
<?php else: ?>
song.play();
<?php endif; ?>
</script>
Does anyone knows how to control flash player with JavaScript?