Unfortunately, I didn't have much time to work on the next version of E-APO
recently, but I will get back to it soon.
This next version will contain a Delay
command and it will also be possible to copy audio to additional "virtual"
channels so that you can apply processing to them and mix them back later.
So you might not be able to directly adjust the delay
of frequency ranges but with some lines in the config file you can split the
audio into virtual channels for specific frequency ranges, apply the delay to
them and then add them together to form the output. You can ask me for an
example of that when the next version is released if you want.
Phase correction will not be possible yet, however.