Displaying cf post formats with oembed

<?php
if (strstr($audio, '<iframe')) {
echo $audio;
} else {
echo wp_oembed_get( get_post_meta($post->ID, '_format_audio_embed', true) );
}
?>

Of course, this would require that you get the custom field with the audio embed code or url into $audio 🙂

Edit – try:

<?php
$audio = get_post_meta($post->ID, '_format_audio_embed', true);
if (strstr($audio, '<iframe')) {
echo $audio;
} else {
echo wp_oembed_get( $audio );
}
?>