Adding multiple social icons to social profiles

Hi. I’m trying to add multiple social icons to the social profiles, and for some reason the icons are not showing up on the webpage. The names get added to the social profiles drop down… but when I load the website… the icons do not appear.

Here is the code I used:

// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
$icons['spotify'] = array( 'font' =>'fontello', 'icon' => 'uf1e9');
$icons['music'] = array( 'font' =>'fontello', 'icon' => 'uf1e9');
return $icons;
}
add_filter('avf_default_icons','avia_add_custom_icon', 10, 1);

// Add new icon as an option for social icons
function avia_add_custom_social_icon($icons) {
$icons['iTunes'] = 'music';
$icons['Spotify'] = 'spotify';
return $icons;
}
add_filter('avf_social_icons_options','avia_add_custom_social_icon', 10, 1);

I imported the fontello zip with both icons in it.