The Custom Emotion Sounds feature allows users to send their own pre-recorded sounds during a conversation. Sounds are played instantly on both ends and are transferred automatically and transparently when needed. Millions of sounds are already available in every category imaginable, all you need is a couple of sound packs to start your private collection. New emotion sounds can also easily be created from existing sound files (such as MP3s) or recorded live from a microphone or another audio source.