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CCS/TLV320AIC3256: TLV320AIC3256

Part Number: TLV320AIC3256

Tool/software: Code Composer Studio

Hi 

I'm working with the TLV320AIC3256EVM-U and the PurePath Studio for its programing. 

I could program and work with the LINE INPUT, USB - Audio EVM through the component inputs, DEC1,2,..., I2S-IN, MONOI2S and MONO DEC. 
Always from the PC or from some device through the Line Input; but; I can't introduce any sound from the Microphone Input. I used microphones 
from the headset, electrelect, semi profesional but nothing occurs. 

Could someone of the colleagues borrow me a schematic in .pfw to try or give me clue about what it's occurring. 

Looking forward to hearing from you soon, best regards

Daniel