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March 2018

George Petersen, Editor of FOH Magazine

Breaking the Boundaries of Stereo

If you have wandered anywhere near industry tradeshows such as NAB, AES, CES, ISE and this month’s USITT Conference & Stage Expo (Fort Lauderdale, March 14 to 17), you will have been inundated with a lot of buzzwords. Perhaps the hottest term these days is “immersive,” in the form of immersive audio, immersive staging and nearly every other type of immersive experience.

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Illustration by Andy Au

Big Ears

There are various videos floating around the internet of a young boy named Dylan Beato demonstrating his uncanny ability to identify piano notes and chords while his back is turned toward the piano. Dylan’s father, Rick, sits at the piano and plays each note, interval, chord and cluster while Dylan listens and identifies each played note, which is then verified by his father.

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Fig. 1: Routing front fills from a console matrix output is just one option to consider. This also shows optional under-balcony fills, which are typically a delayed version of the main P.A. feed.

Using Front Fills

This may seem counterintuitive, but the front few rows at church are often the worst places to sit, at least for good sound. Seasoned sound engineers instinctively know that if they go to a concert, they want to sit as close to FOH as possible. The front row is cool to be close to your favorite artist (or pastor in this case), but the sound is often lacking.

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FOH Magazine Theory and Practice - Passive and Active Crossovers

Crossing Over

We hear the term crossover all the time in pro audio, and crossovers play an extremely important role in our P.A. systems. A crossover (sometimes called a “crossover network” or “frequency dividing network”) is an audio circuit that divides the full frequency range into high- and low-frequency bands, and sometimes also mid-frequency bands.

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