Tips on Customizing Html5 Audio Player – Audio Player for WordPress

How to Hide Html5 Audio Player Admin Menus

function plt_hide_html5_audio_player_menus() {
	//Hide "Html5 Audio Player".
	remove_menu_page('edit.php?post_type=audioplayer');
	//Hide "Html5 Audio Player → Html5 Audio Player".
	remove_submenu_page('edit.php?post_type=audioplayer', 'edit.php?post_type=audioplayer');
	//Hide "Html5 Audio Player → Add Audio Player".
	remove_submenu_page('edit.php?post_type=audioplayer', 'post-new.php?post_type=audioplayer');
	//Hide "Html5 Audio Player → Help".
	remove_submenu_page('edit.php?post_type=audioplayer', 'h5ap-support');
	//Hide "Html5 Audio Player → Affiliation".
	remove_submenu_page('edit.php?post_type=audioplayer', 'html5-audio-player-affiliation');
	//Hide "Html5 Audio Player → Contact Us".
	remove_submenu_page('edit.php?post_type=audioplayer', 'html5-audio-player-contact');
	//Hide "Html5 Audio Player → Upgrade".
	remove_submenu_page('edit.php?post_type=audioplayer', 'html5-audio-player-pricing');
}

add_action('admin_menu', 'plt_hide_html5_audio_player_menus', 1000000000);

Where do I put this code?

How to Hide the "Player Configuration" Meta Box

function plt_hide_html5_audio_player_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Player Configuration" meta box.
	remove_meta_box('_h5ap_plyr', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_html5_audio_player_metaboxes', 20);