Custom post type (podcast) not showing in RSS

Well, I figure out how to get it to feed into the homepage RSS. I had to disable the option to do so within the settings and put it manually within functions.php.

// ADDING PODCAST TO HOMEPAGE QUERY
function my_get_posts( $query ) {
	if ( is_home() && $query->is_main_query() )
		$query->set( 'post_type', array( 'post', 'podcast' ) );
	return $query;
}

// ADDING PODCAST TO RSS
function mycustomfeed_cpt_feed( $query ) {
        if ( $query->is_feed() )
            $query->set( 'post_type', array( 'post', 'podcast' ) );
        return $query;
}
add_filter( 'pre_get_posts', 'mycustomfeed_cpt_feed' );

So, it shows up now, however, the RSS feed doesn’t validate and is throwing errors due to this line:<enclosure url="https://s3.amazonaws.com/ats-ymc/YMC_Episode003.mp3" length="" type=""/>

The length and type values are null. Any thoughts or ideas how to resolve this?

This is all sorted out in v1.8 of the plugin that I have just released. Please read this for more information: https://www.hughlashbrooke.com/2015/01/important-upgrade-information-seriously-simple-podcasting-v1-8/

Cheers,
Hugh