Patent ID: 8213984

Claim:
An auxiliary interface device, comprising: an input to interface to the signal output of a signal source apparatus, said signal source apparatus developing, receiving, or able to receive more than one signal, said signal source apparatus providing for the user selection of at least one of the signals in deference to the others so that said signal source apparatus provides for the selection of at least one special signal having predetermined characteristics, a detector which recognizes the presence of the at least one said special signal when present or part of a signal developed by the signal source apparatus to which said auxiliary interface device is connected, said detector being able to distinguish between said at least one special signal and other signals ordinarily provided by the signal source apparatus to which said auxiliary interface device is interfaced, a signal switch and/or selection circuits to substitute at least one auxiliary signal in place of a signal output by the said signal source apparatus to which said auxiliary interface is interfaced, said signal switch and/or selection circuits being configured to substitute said at least one auxiliary signal for the signal normally developed by said signal source apparatus to which said auxiliary interface device is interfaced when said detector recognizes the presence of the at least one special signal in the signal normally developed by said signal source apparatus to which said auxiliary interface device is interfaced.