Is there a simple method for waking up on an Audio input? Thanks!
Unfortunately not. The DSP has to be awake to do any processing. You did not mention which DSP you are referring to but all the SigmaDSP products will not processing anything with the core stopped. You would have to have some sort of controller that is also monitoring the audio input and when it sees audio it would wake up the DSP and un-mute the audio.
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