CDDA + iso extracted from cdi can work in future updates?

[SWAT]

At some point I removed mono CDDA support. I thought it was a useless feature that took up memory...
But if it makes sense, I can return it. It will really be faster, I just thought that it is already fast with stereo ADPCM )
But apparently there are games where this is not enough.

And answering the question in the topic title - yes, CDDA can work with ISO, just put the CDDA tracks to same directory as ISO with the same naming as for GDI, only the numbers need to be shifted.