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Whether one is producing music, podcasts, game sounds, or film sound effects, Digital Audio Principles provides the tips and techniques that will make the project a success. Author Dave Schroeder explains the basics of digital audio production techniques and covers the essential hardware and software. He also discusses sound theory, frequency response, the range of human hearing, and dynamic range.
So now we're going to look at microphone placement on a guitar amplifier, and this is this will come up a lot. The way you start out is that we've got a dynamic microphone, and we're aiming it right at the center of one of the two speakers. Now in this amp you can see kind of the wear marks where the speakers are. This is a twin amp, there are two speakers. Here I have a little thing I want to show you to kind of point out how a speaker works. Basically this is the center of the speaker, right. It's in the center, but there's a little bump out there.
You want to point your microphone right on that bump out to start with. So that's what I've got. I've got a Shure SM58 directional cardioid microphone pointing pretty much dead center and, more or less, on axis at the center of the speaker. Now this is going to provide you with kind of the brightest, most direct sound that you can get from the amp. Also before you do this if there's, if you have an amp with two speakers, put your ear kind of close to each one and see if one sounds better than the other, if one is noisier than the other.
Sometimes one speaker will kind of be buzzy and hissy, one won't. Some guitar amplifiers are really clean in terms of the amount of noise they make, even when nothing is coming through them. Others kind of have a hum, or a buzz. If your microphone is placed on a speaker, and you're getting a lot of that hum, or buzz, from the speaker, a lot of zzzzz... noise, you can change the placement of the mic to move it off-center a little bit and pick up kind of the edge of the center of the speaker, and that'll reduce some of the buzz, or the noise. And you can keep playing with that. You can play with the axis. Point it up kind of towards the edges.
You can point it towards the center. You can point it kind of anywhere you want, but start with it here and assess the quality of that sound and then figure out how you might want to change it. Of course, guitar amps can be really loud. So, you know don't put your head right next to it when someone's playing it but kind of be in the room with it when they are playing it and then have them kind of maybe play at a lower level or have them move the mike from one speaker to the next. Go in the studio, record it really, you know just a test run and see how noisy it is and then try the other speaker as well. Now let's look at miking up some drums.
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