I have used MKE 400 in the past and have gotten away with decent audio whenever I needed to be as discreet as possible.
Perhaps it's time to upgrade to the 440 which seems like a nice jump although I notice the battery life in the 440 is about 100 hours (w 2 AAA batteries) when the 400 gives about 300 hours (w 1 AAA battery) give or take.
Thank you for the information about the battery life. Really good to know. I'm not familiar with the MKE 400, but it looks like a pretty solid mic as well.
Just listened to some samples.. That thing is amazing! It's a perfect stereo / shotgun hybrid. Anything online you've used it for?
Here's a link to a very rough video I made yesterday to learn more about sound quality and just for fun.
password: eamon
A filmmaker buddy of mine is building miniature sets for his currently in-progress movie. I asked him about his process and just messed around a little bit. I left the sound exactly as recorded and very rough to give a sense of the mic, what it does directionally, what it sounds like off-axis. Levels generally peaked around -12db, though there were a few spikes. You can hear the image stabilization from the Canon 100mm Macro in the first shot, before I switched it off. There's short stretch where it picked up a flock of geese flying by outside, which I thought was kind of cool.
Workflow was MLV -> Resolve -> Cinelog-C -> Premiere -> FilmConvert
Anyway, hope that it proves to be useful information in your search.