AlfredTweet patch. track informations should not be encoded to utf-8 at this point. Workflow seems to handle encoding correctly.

playing.php

/**
* Description
* Accepts a player name as an argument and reads the values
* of the track name and artist for the currently playing track
* of that player
*
* @param $player - name of the player to read data from
* @return array - array of track name and artist for that player
*/
function get_tracks( $players )
{
	$tracks = array();
	foreach( $players as $player ):
		$track 	= `osascript -e 'tell application "$player" to return name of current track'`;
		$artist = `osascript -e 'tell application "$player" to return artist of current track'`;
		$album  = `osascript -e 'tell application "$player" to return album of current track'`;

		$track  = str_replace("\n", "", $track);
		$artist = str_replace("\n", "", $artist);
		$album  = str_replace("\n", "", $album);
		array_push( $tracks,
			array(
				'track'  => $track,
				'artist' => $artist,
				'album'  => $album,
				'player' => $player
			)
		);
	endforeach;
	return $tracks;
}