I am trying to wrap my head around Wowza capabilities. I am working on a prototype or on demand audio-only streaming and I am not decided yet on the protocol (be it HLS, HDS and/or RTMP, encrypted or not). From what I saw they all support adaptive bitrate streaming but you need to provide the different bitrate medias upfront + the SMIL file. Or use the transcoder addon. Unfortunately all the example I found for transrate.xml shows video birate adapting and not audio only. Is that possible?