Hi everyone. I've faced the problem m4a playing. I tried to use CMdaAudioOutputStream by setting KMMFFourCCCodeAAC data type but it leaved with KErrNotSupported. Seems like system just has no such codek. But m4a (and other unsupported) are played with standart built in player just fine. Does built-in player just uses some 3rd party functionality or it uses system API? If someone succeeded to play m4a via any system API PLZ HELP!!!