| 摘要 |
A method and apparatus for selectively sending a first signal or a second signal to an output signal are described. An electrical characteristic of a device coupled to the output is determined, and, in the event the electrical characteristic is determined to be a predetermined value, the first signal to the output, otherwise, the second signal is sent. A detector coupled to the output of an information handling system detects a characteristic of a device coupled to the output. The characteristic is indicative of the type of signal sent to the output. A first type of signal is sent to the output when the characteristic has a predetermined value and a second type of signal is sent to the output when the characteristic does not have the predetermined value. Whether a speaker is an analog speaker or a digital speaker may be automatically determined, and an appropriate analog or digital signal is sent to the speaker depending upon its type.
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