CMdaAudioPlayerUtility::OpenUrlL() not implemented (Known Issue)
CMdaAudioPlayerUtility::OpenUrlL() is not supported in the S60 platform. This method does not leave, but KErrNotSupported (-5) is returned in MMdaAudioPlayerCallback::MapcInitComplete().
http:// URLs are not supported. However, from S60 2nd Edition FP2 onwards OpenUrlL() from CVideoPlayerUtility can be used for opening rtsp:// URLs with RealAudio (audio-only) streams.