Music is usually recorded dry and with only a single microphone, i.e., with a microphone placed closely to the instrument with as little influence from the surroundings as possible. When played back without further modification, signals recorded this way tend to not sound very good and, worse yet, they do not sound natural, as they lack the sound of a natural acoustical environment. To mitigate this, artificial reverberation (reverb for short) is usually applied to such signals before playback. This is done not only in music production, but also in television and movie production. Artificial reverberation basically makes it sound like a sound is being played in a desired environment, such as a large concert hall, a conference center, a cathedral, or a high-quality music recording studio.
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