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// Change labels to "Tracks"
add_filter('edd_download_labels', 'set_download_labels');
function set_download_labels($labels) {
	$labels = array(
		'name'               => _x('Tracks', 'post type general name', 'your-domain'),
		'singular_name'      => _x('Track', 'post type singular name', 'your-domain'),
		'add_new'            => __('Add New', 'your-domain'),
		'add_new_item'       => __('Add New Track', 'your-domain'),
		'edit_item'          => __('Edit Track', 'your-domain'),
		'new_item'           => __('New Track', 'your-domain'),
		'all_items'          => __('All Tracks', 'your-domain'),
		'view_item'          => __('View Track', 'your-domain'),
		'search_items'       => __('Search Tracks', 'your-domain'),
		'not_found'          =>  __('No Tracks found', 'your-domain'),
		'not_found_in_trash' => __('No Tracks found in Trash', 'your-domain'), 
		'parent_item_colon'  => '',
		'menu_name'          => __('Tracks', 'your-domain')
	);
	return $labels;
}