External amplifier interface
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United States of America Patent
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Jan 23, 2018
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N/A
app pub date -
Dec 7, 2016
filing date -
Dec 7, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An interface configured to allow desired cooperation between an OEM or aftermarket head unit and an external power amplifier. The inventive interface receives an audio input signal from the head unit. It also monitors the vehicle's CAN bus. The interface detects CAN bus commands that cause the head unit to play an audio notification signal such as a “chime.” Upon detecting such a CAN bus command, the inventive interface selectively adjusts the output level so that the user hears the audio notification signal at an appropriate volume.
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