1980-10-03
1982-11-02
Popek, Joseph A.
179 1VL, H04R 2700
Patent
active
043574920
ABSTRACT:
A sound reinforcement apparatus is provided for combining a number of individually generated audio signals and outputting a collective audio signal representative of the sum of the individual audio signals. The apparatus includes a plurality of volume regulating circuits. Each volume regulating circuit communicates with a microphone which outputs one of the audio signals. Each microphone receives the sound produced by one vocalist or instrumentalist. Each of the volume regulating circuits outputs a modified audio signal having a fixed, predetermined level. A volume control signal is also outputted by each of the volume regulating circuits. The volume control signals are sent to a volume summing circuit which outputs a volume control restoring signal. The audio signals are applied to an audio sum circuit which outputs an audio sum signal. After the individual audio signals have been summed together in the audio sum circuit, the dynamics of the audio signals altered in the volume regulating circuits is restored in the audio sum signal by means of the volume control restoring signal so that a quality and pleasing sound is produced which is not dominated by any one instrumentalist or vocalist.
REFERENCES:
patent: 3992584 (1976-11-01), Dugan
patent: 4149032 (1979-04-01), Peters
Campbell Eugene
Whittemore Terrance R.
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