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4357492 |
Automatic microphone mixing apparatus
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...
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4306114 |
Automatic audio mixing selector device
An automatic mixing selector device for use with an audio amplifier or tuner for automatic priority selection and digital fading of two or more audio sources using the amplifier and tuner controls....
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4275268 |
Mixing apparatus
A digital signal mixing apparatus for mixing digital signals in S input channels to obtain digital mixed signals in T output channels is provided which includes a memory in which a matrix of S...
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4232190 |
Apparatus for combining phonograph signal with auxiliary audio signal
The output signals of a phonograph and of an auxiliary audio signal source, such as a high impedance microphone, electric guitar, or the like, are combined before being fed to the amplifier of the...
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4230908 |
Telephone summing circuit
The addition of two digitized audio signals, each of which has been non-linearly compressed and PCM encoded, is accomplished by converting only one of the signal samples (preferably the smaller) to...
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3992584 |
Automatic microphone mixer
In a sound reinforcement system having a plurality of input channels and input signal sources and at least one output channel, a gain control apparatus is provided for controlling the gain applied...
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3051788 |
Amplifier interconnecting circuit
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3020343 |
Audio selective fading system
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