Retrieves the current type of EAX environment and its parameters.
|env||The EAX environment... NULL = don't retrieve it. See BASS_SetEAXParameters for a list of the possible environments.
|vol||The volume of the reverb... NULL = don't retrieve it.
|decay||The decay duration... NULL = don't retrieve it.
|damp||The damping... NULL = don't retrieve it.
If successful, then TRUE is returned, else FALSE is returned. Use BASS_ErrorGetCode to get the error code.
|BASS_ERROR_INIT||BASS_Init has not been successfully called.
|BASS_ERROR_NOEAX||The current device does not support EAX.
When using multiple devices, the current thread's device setting (as set with BASS_SetDevice) determines which device this function call applies to.
EAX and this function are only available on Windows.