You're never going to be able to teach her to recall from a fixated, adrenalized state.... the key will be to teach her an alternative behavior when she first notices a prey animal, before she fixates. Whether she genuinely "isn't hearing" you (ever been so hyperfocused on something you don't notice anything else going on around you?), or is just ignoring you in favor of acting like a spaz, the solution is the same, and hinges on catching and redirecting her before she fixates.
To do this, you have to figure out a way to work under threshold, whether that means finding a stationary "prey" animal so as to not provoke her prey drive as much (maybe a neighborhood cat who always hangs out in the same location, or if the distance is great enough you could probably even use a small, squirrel shaped stuffed toy), and/or working at a great enough distance that she isn't obsessing (there is always some middle ground, however finite, where the dog sees a trigger, but isn't immediately fixated- it may be 100', it may be 1000').
Ideally, to start, you want to be far enough away/low enough activity that she merely glances at it, and goes on about her business. When she sees it, call her or ask her to look/focus on you, or whatever replacement behavior you want, then reward heavily. When she is consistently performing the replacement behavior upon seeing prey item at whatever distance/whatever level of activity (without being asked- just because she knows what it means), then you can move slightly closer, repeat, move closer, repeat. Same with increasing activity level of the prey item.
Personally, I like to use being allowed to chase as a reward for not chasing prey items as well (Premack I guess?)- so in those cases, it would go like: dog sees prey animal, dog turns focus to me, I praise and/or reward, I release dog ("ok", "go", whatever), dog chases, I either recall or retrieve dog after chase is over. Eventually, the dog learns that if they "ask" by giving me their full attention, I just might let them give chase. My 2 off leash ok prey driven dogs have also had high toy drive, and I've had good success with calling them, producing a toy, and engaging them in play instead. Of course, both of these are still contingent on catching the dog before they fixate.
I would also work on teaching a good "leave it", "look", and recall while playing with toys, particularly when she's super amped up and really into it. I have an easier time with Bus because he's learned to keep one ear tuned in even when in (toy) drive, so if I yell "OFF" while he's tearing off after a rabbit, he will usually at least slow a hair to consider, which gives me a decent chance at recalling him. Honestly, the biggest problem I have with him is when we're near water, he'd run by a dozen rabbits and a basket of squirrels to dive into a half frozen swamp right about now. I think one good way to work on impulse control with a toy driven dog is by placing a toy they like down, then working obedience around it, releasing them periodically to get it as a reward. If they are toy driven, that is a much bigger distraction than toy on your person, and they learn the concept of still listening even when they REALLY want to do something else. I guess you could do the same with a really food motivated dog, but toys are much easier IME.
Granted, no training is ever 100% effective, but it is still a good idea to practice these scenarios, as you never know when something unexpected may happen and you may find your dog not under your physical control (I once had a dog chase a cat and hit the heavy duty leash snap off the corner of our cement house foundation just right that it bent it nearly straight, releasing her). I would still not let her off leash in public, as if anything happens, you/she could be punished, but it sounds like working on this would still benefit both of you, even if it doesn't open further off leash possibilities.
Do you ever let your hound off leash? 
