http://www.rfc-editor.org/rfc/rfc7310.txt
RFC 7310: RTP Payload Format for Standard apt-X and Enhanced apt-X Codecs, J. Lindsay, H. Foerster2014-07-01T23:00:00-00:00This document specifies a scheme for packetizing Standard apt-X or Enhanced apt-X encoded audio data into Real-time Transport Protocol (RTP) packets. The document describes a payload format that permits transmission of multiple related audio channels in a single RTP payload and a means of establishing Standard apt-X and Enhanced apt-X connections through the Session Description Protocol (SDP).