Separate sound recorders give you more flexibility, especially if you just want to record audio in a certain location but not video. Many professionals use DAT (digital audio tape) recorders to record audio, but DAT recorders typically cost hundreds or (more likely) thousands of dollars. Digital voice recorders are also available, but the amount of audio they can record is often limited by whatever storage is built in to the unit. For a good balance of quality and affordability, some of the newer MiniDisc recorders are good choices. If you do record audio with a separate recorder, one problem you’ll have later is precisely synchronizing the audio recording with the video image that you recorded. Professional video and filmmakers solve this problem using slates. A slate is that black-and-white board thingie with all the chalk writing on it that someone snaps closed just before the director yells, “Action!” The slate isn’t just a kitschy Hollywood gimmick. When the slate is snapped closed in front of the camera, it makes a loud snapping noise picked up by all audio recorders on the set. That sound and the video image of the slate can be used later to precisely synchronize the separate audio and video recordings. If you plan to record audio with a separate audio recorder, I recommend that you construct and use a simple slate of your own. You can make it using two boards and a hinge purchased at any hardware store. (Just watch your fingers, okay?)
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