This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
(latest known version)
CodEx is an InternalUI app which is used to read data from different audio sources. It appears to need a VPN connection, as it always fails to read data from the codec registers when any of the three sources are chosen, those being AppleMaggieArcAudio, AppleCS35L26Amp, and AppleCS42L71Audio.