Isn't this the same file as you posted in Post #1152?
Ohhh... now that my mind is clearing up a little from waking up "com.parrot.asteroid.audio.effects.AudioFXManager.setAudioEffectsDefau ltsValues". This might be a class of /system/framework/com.parrot.asteroid.jar as noted in /etc/permissions/com.parrot.asteroid.xml file. Not sure if you want to try it but I've attached it.
BTW, have you considered downloading the PLF for the Asteroid Smart? Seems to me that it might benefit you the most if you a copy of the potential files that you can merge into the SCT.