All great suggestions. Definitely want something utilizing RPN (Still have a working HP 15c in my desk). I think I will give pcalc a spin even though it is not free, it looks to have some nice flexibility. Plus I can get the ipad and OSx version for $0.99 more than if I buy the OSx version alone.
and effectively acts more like a closed headphone, as far as sound leakage, than many "trully closed" headphones. Of course without any supporting evidence or double-deaf tests.
That's what Napolean said ...
Not really my field but the limited amount of research i have seen is pretty primitive and much more conjectural than I am comfortable with.
Had a nice 45 minute conversation with the dean of the college of science and mathematics at Arkansas State University. Looks like I will be heading south for a few days next week.
I'm still using my Rotel 1068 in the HT rig as it sounds good and is a really solid piece of equipment. Lack of HDMI switching has not really been enough of an incentive to upgrade.