Is it possible to access the audio output stream after it has been mixed with android ndk?

Question

I am trying to modify audio output streams from for example a media player app before it is send to the loudspeakers on android. Is that theoretically possible somehow?

Answer 1

It is not possible to access the audio frames directly, however, you can use the subclasses of AudioEffect, such as Equalizer and DynamicsProcessing to add effects to the global output mix. You will need to assign these effects to session id 0.