Microsoft's OneNote supplied with Office2010 does very well for note taking software. It includes the function to record audio/video, or just audio. The options in the program for Codec are a) Windows media audio 9, b) windows media audio 9.2, and c) windows media audio 10 professional. Especially in the case of the latter Codec, many formats are available, from <0kbps, 8kHz, mono CBR>, to <320 kbps, 44kHz, stereo (A/V> CBR>. They seem to be divided into two categories: (A/V) and non-A/V (whatever that means, I don't know), and then according to their kHz, and then from kbps. Thrown in also are options for stereo, mono, and what's called "low delay CBR".
With a basic understanding of these terms, one could likely guess that 320kbps 48Khz CBR is overkill for this philosophy of use, and 0kbps 9 khz, mono CBR leaves something to be desired in quality, especially with 1tb hard drives around these days. However, answering the question of precisely which format would be most well suited to this philosophy of use is another question that might require a different level of knowledge than most people would have. One could take the try-it-and-see approach, but this question seems to well suited to superuser to pass up the opportunity to post.
So, my question is: Which Codec/Format combination would be most well suited to the philosophy of use of recording audio for notes, in a large or small lecture hall. That might be two questions; would a certain codec be desirable in certain sized rooms?
p.s. subquestion: What does, in the windows media audio 10 professional codec, the format (A/V) designate?