Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Patent
1986-11-07
1989-09-05
Isen, Forester W.
Electrical audio signal processing systems and devices
Including amplitude or volume control
Automatic
381119, 381106, H03G 300
Patent
active
048646270
ABSTRACT:
A sound mixing control system applicable to recording, broadcast and sound reinforcement systems. The gain provided for each input channel through the system is monitored, and whenever the sum of all the gains exceeds a threshold the overall gain is reduced to limit the sum of the gains to the threshold. Simultaneously the output level of the mixer is measured, and whenever the level would otherwise exceed a threshold the gains of the input channels are reduced in proportion to their individual levels to limit the output level to the desired maximum. Signals may be divided into multiple frequency bands, processed in parallel and recombined.
REFERENCES:
patent: 3992584 (1976-11-01), Dugan
patent: 4249042 (1981-02-01), Orban
patent: 4357492 (1982-11-01), Campbell et al.
patent: 4442546 (1984-04-01), Ishigaki
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