Seriously Simple Podcasting: Modify number of episodes that appear in podcast RSS feed

functions.php

add_filter( 'ssp_feed_number_of_posts', 'ssp_modify_number_of_posts_in_feed' );
function ssp_modify_number_of_posts_in_feed ( $n ) {
  return 25; // Where 25 is the number of episodes that you would like to include in your RSS feed
}