I am considering recording my lectures onto a digital recorder. My classes take place in a 300-person lecture hall and I was wondering how well the teacher's voice is actually recorded. Also, how far from the teacher can these things be placed and still make decent recordings? Any recommendations? Thanks.

Althought I've considered it many times, I've never actually done it. Mainly due to the fact that I probably won't sit down and listen to it again. Depending on the professor's voice, the quality of your recorder, you could probably pick up a recording about half way up the auditorium. To be safe, I'd sit close to the front though. Let me know how it goes.

Yeah virtually all of the people who use recorders here sit in the front two rows, except in orgo where the professor wears a mic so the sound never drops off. But sit close to the front or close to a speaker if you have that setup.

for important lectures I do, I have a cheap little $20 recorder, works well though.