Yes, I know that. I have adjusted the audio input level jumpers to the microphone level as shown in table 2-1. Hence, the value I'm getting on the waveform graph is from the two onboard microphones (not audio line-in).
The microphone will detect the ambient sound pressure and convert them to electrical energy which is the analog input voltage. Also, this microphone has a build-in gain too. Next, it will undergo a op-amp with a gain of 1.78. Lastly, this signal is converted to digitize value signal by a A/D convertor.
So, my question: Where is the maximum working for analog input refering to if I'm using the onboard microphones?
