Digital Voice Recorder at SonyStyle.com
The model I purchased a few years ago appears not to be currently available but I purchased the Sony ICD-MS515 Digital Voice Recorder for $350 with the Dragon Naturally Speaking software. I would assume that any currently available model is superior but I am not sure. The ICD-MS515 is the only model I have tried and it worked perfectly. I purchased the top-of-the-line model so I could ensure it worked without problems but I still wonder if the cheaper models possess the same circuitry.
I used that voice recorder for every class. Obtain a little, external, clip-on microphone so you can put the voice recorder in an inside pocket of your backpack and clip the microphone somewhere on the outside of your backpack so it is not noticeable. Purchase three or four sets of rechargable batteries and a battery charger. The voice recorder helps when you are busy writing notes and the professor is talking quickly. It also helps to go over the material a second time after class. I would listen to each lecture afterwards and hand write every word stated in class to a second set of notes. I felt a complete understanding of the material after writing down my second set of notes and listening to the lecture a second, third, or even fourth time. It sometimes takes a couple times to get some statements due to background noise and such. That cough from the person behind you that you do not notice in class becomes ear shattering when listening to the lectures afterwards.
Another option is to install Dragon Naturally Speaking on your computer, train your voice for it, and then speak out the lecture as you hear it so it is written down electronically. This set of word-for-word lecture notes is invaluable later. It is an excellent idea to purchase the voice recorder and discipline yourself to listen to the lectures aftwards and I highly encourage it. The voice file makes it handy if a friend misses class. You can provide this *friend* with a copy of the voice file, or if the person is merely someone you know you can give them a copy of your notes and not worry too much when they do not return your notes to you.
EDIT: the minidisc recorders are not able to store as much as a digital memory voice recorder can. Imagine having to exchange your minidisc in the middle of lecture, it is not fun. A friend with a minidisc wished she had purchased the Sony digital voice recorder instead after seeing the advantages it has over the minidisc recorders.
EDIT: The
ICD-BM1VTP for $350 seems to be the successor to my ICD-MS515. This model is the same as the ICD-BM1, just with an extra $50 for the Dragon Naturally Speaking software. Do not mind the high price. If you discipline yourself and use this as I mentioned above, it will become even more useful to you than any computer can possible be.
EDIT: It is necessary to sit close to the front of the class to obtain the professor's voice clearly and without distractive noise from other people inbetween you and your professor. The voice recorder will easily pick up the professor from the back of a 300 person lecture hall but the people inbetween you and the professor will come in louder than the professor will. Little noises such as coughs, squirming in seats, and people talking become very distracting and decrease the quality of the recorded lecture.
EDIT: Yes, an external microphone is necessary. Especially for any voice recorder with moving parts because the soft noise from those moving parts, such as a cassette recorder, become the closest and most annoying noise when you are later listening to the recording.