In computer and telecommunications networks, presence information is a status indicator that conveys ability and willingness of a potential communication partner—for example a user—to communicate.
In an amplifier, a presence control boosts the upper mid-range frequencies to make the sounds of voices and instruments with similar tonal ranges seem more "present".
In filmmaking and television production, presence, also known as room tone, or simply room sound, is the "silence" recorded at a location or space when no dialogue is spoken.
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