WP 3.5 Metabox Uploader

pu01_metabox_uploader_modal.html

<script>

var file_frame;
var wp_media_post_id = wp.media.model.settings.post.id;
var set_to_post_id = <?php echo get_the_ID(); ?>;

jQuery('.upload_image_button').on('click', function( event ){

	event.preventDefault();

	if ( file_frame ) {

		file_frame.uploader.uploader.param( 'post_id', set_to_post_id );

		file_frame.open();
		return;

	} else {

		wp.media.model.settings.post.id = set_to_post_id;

	}

	file_frame = wp.media.frames.file_frame = wp.media({
		title: jQuery( this ).data( 'uploader_title' ),
		button: {
			text: jQuery( this ).data( 'uploader_button_text' ),
		},
		multiple: false
	});

	file_frame.on( 'select', function() {

		attachment = file_frame.state().get('selection').first().toJSON();

		jQuery( '#pu01_audio-box' ).val( attachment.url );

		wp.media.model.settings.post.id = wp_media_post_id;

	});

	file_frame.open();

});

jQuery( 'a.add_media' ).on('click', function() {

	wp.media.model.settings.post.id = wp_media_post_id;

});

</script>

<label for="pu01_audio">Audio</label><br>
<input size="50" type="text" name="pu01_audio" id="pu01_audio-box" value="<?php echo esc_url( $value ); ?>" />
<input type="button" data-uploader_title="Choose or Upload an Audio File" class="button upload_image_button" name="pu01_audio_uploader" id="pu01_audio_uploader" value="Upload" />