well in all fairness: yes it might be up to 8 minutes you can sample… but that would also mean that you don’t deploy ANY flexmachine…
if you did - the memory taken up by those flex machines would need to be subtracted (as stated by others)… so to answer you initial question: no you can’t… and even though you might get the numbers right to add up to the 8 minutes … whats the point of doing that when you can’t use all the fun the octatrack is about (the flex machines - for me at least, mind you - others would beg to differ)… I’m already struggling bouncing a 6 bar loop down to one track if I use my typical workflow of having a couple of flex machines running on slow tempo… just my 2 cent… and even though it would theoratically be possible I find misleading to claim you can sample up to 8 minutes.