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Audio - Audio is the science and art of recording or reproducing sound through mechanical or electronic means. The field includes many disciplines, such as electrical engineering, acoustics, and music with de. Used . sign, installation and operation of sound recording and reproduction equipment as the focus. . Used . ...

Mount Speakers - A speaker designed to be mounted on or in a wall or on a stand.. Used . . Used . ...

Amphitheatre - The name amphitheatre (alternatively amphitheater) is given to a public building of the Classical period (being particularly associated with ancient Rome) which was used for spectator sports, games an. Used . d displays.

Apart from function, the important outward distinction between an amphitheatre and a theatre is that an amphitheatre is round or oval in shape (whereas a classical th. Used . eatre was semi-circular). However, an amphitheatre differs from a circus, which was used for racing and looked more like a very long, narrow horse shoe.

The best-known amphitheatre in the world is...

AB - A stereo recording technique. Two microphones of the same make and model are located next to one another in , and point in the same direction. The left mic is panned hard left on the mixer. The right. Used . mic is panned hard right.

This technique has flaws, such as audio reflections from each mic which can cause comb filtering (narrow coverage). This can be somewhat corrected by s. Used . pacing the mics out, but this will not fully correct the problem and can lead to muddy sound from delay artifacts.

Achromatic - A lens arrangement designed to decrease chromatic aberration, for example: to set the same focal length for red and blue light at the focal plane. Also, a color having no chroma as in black, white and. Used . grays created by mixing black and white instead of other colors that are made of chromatic pigments.. Used . ...