AirReceiver is an all-in-one media player that supports multiple audio and video playback streams. It is designed to be a background player that continuously plays media in the background while you do other things in the app. 

You can control playback of each stream with an easy-to-use interface. You can add and remove streams to play what you want. You can also change the media format of the streams you play. 

It supports many popular audio and video formats, including MP3, AAC, AC3, MP4, MKV, MOV, OGG, FLAC, and more. It also supports many popular streaming protocols like HTTP, HTTPS, MMS, RTSP, and WebSockets.