You could return the data and set a local variable:
function get_album_info() {
$album = array(
'art' => wp_get_attachment_image_src( get_sub_field('album_art'), 'full' ),
'date' => get_field('album_date')
);
return $album;
}
$album = get_album_info();
echo $album['art'];
echo $album['date'];