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Music 265b Week 03 Instruments & Microphone Placement

PDF Version is available HERE In Basic Audio Recording Techniques, Chapter 7, we discussed how different types of microphones work. Here, we have a brief review of microphones, direct boxes, and the other studio equipment that serves as the first link in our signal chain.   Dynamic Microphones   What Are They?   Dynamic microphones use a diaphragm and a metal coil suspended in a magnetic field. When the coil moves (dynamically) within the magnetic field, the microphone converts acoustic sound into an electronic signal. This configuration is similar to the way a loudspeaker converts an electronic signal into acoustic…

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DIY Sub-Mic

Somewhere in your collection of gear, you might have an old guitar amp, or a blown pair of speakers lying around. If you can salvage an intact (unbroken/blown-out) speaker cone, you can make your very own sub-mic for next to nothing. Speakers and dynamic microphones are made with some of the same kinds of components: the sizes are different, and signal flows in opposite directions. One converts sound into signal, while the other converts signal into sound. Wire them backwards, and you can turn one into the other. Wiring a speaker backwards will turn it into an extremely large-diaphragm microphone,…

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