It looks like the app tries to do its own audio file parsing and (wrongly) assumes .aac files are always MP4 containers [0] rather than as ADTS. So perhaps not

It looks like the app tries to do its own audio file parsing and (wrongly) assumes .aac files are always MP4 containers [0] rather than as ADTS. So perhaps not the best example of what you're trying to say. [0] https://github.com/malizadehq/ringdroid/blob/master/src/com/ringdroid/soundfile/CheapAAC.java#L210 https://github.com/malizadehq/ringdroid/blob/master/src/com/...