We do not have support for AAC on Android at this stage. Indeed there is decoding capability in OpenSL for Android 4.0 and newer devices but unlike iOS there is no guarantee that it is backed by a hardware decoder so there seems to be little benefit at the moment.
The FMOD Ex product is in maintenance mode now, we are providing continual support, fixes and essential platform functionality however no longer adding cross platform features.
Regardless, we are not able to support AAC in a generic cross platform manner like we do with MP3, Ogg Vorbis, ADPCM etc. The reason here is due to licensing restrictions, as such we only provide limited support for AAC on iOS via the platform native decode API.
The low level API, FMOD 4 (aka FMOD Ex) and the high level runtime API FMOD Event will now only receive fixes for bugs and essential platform specific development.
Our new low level API, FMOD 5 and the high level replacement FMOD Studio Runtime are under active development with improvements and features.
If you are planning a new title I’d encourage you to try out FMOD Studio.
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