soundcloud has icons for the following link types: bandpage, bandcamp, bandsintown, beatport, berklee, ccmixter, discogs, facebook, flavors, flickr, foursquare, freesound, gigatools, google_plus, hypem, instagram, itunes_podcast, lastfm, linktree, mixcloud, myspace, ning, pinterest, purevolume, residentadvisor, residentadvisorlabel, reverbnation, snapchat, songkick, soundcloud, spotify, thedjlist, tumblr, twitter, vimeo, virb, vkontakte, whatpeopleplay, wordpress, youtube, zeroinch