7. A method comprising: configuring, by a processor, a first low power audio channel and a second audio channel into a low power mode of operation, wherein the processor turns on the first low power audio channel and turns off the second audio channel during the low power mode of operation, the processor having signal lines coupled to the first and second audio channels, and wherein the first low power audio channel and the second audio channel are coupled to a microphone; and receiving, from the microphone, an input signal in the first low power audio channel, wherein the processor turns on the second audio channel when the first low power audio channel receives the input signal above a first threshold.
7. A method comprising: configuring, by a processor, a first low power audio channel and a second audio channel into a low power mode of operation, wherein the processor turns on the first low power audio channel and turns off the second audio channel during the low power mode of operation, the processor having signal lines coupled to the first and second audio channels, and wherein the first low power audio channel and the second audio channel are coupled to a microphone; and receiving, from the microphone, an input signal in the first low power audio channel, wherein the processor turns on the second audio channel when the first low power audio channel receives the input signal above a first threshold. 11. The method of claim 7 further comprising converting the input signal from an analog signal to a digital signal in the second audio channel.