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ADAU1361 ALC Selection and Muting

Question asked by Galenthas on Jan 24, 2018
Latest reply on Jan 26, 2018 by Galenthas

Hello,

 

We have a ADAU1361configuration that has two single ended MICs as inputs. We have used the ALC feature before, now we want to use ALC for the 1st channel but turn ALC off for the 2nd channel. We do this with the ALCSEL register (let's say LEFT channel only) and it seems to work. We also employ the muting function on the ADAU1361 to mute the outputs when the signal is below a given threshold.

 

The mute function seems to operate on both ADCs regardless of the ALC channel selection bits. We need it to operate seperately, muting one ADC output while second ADC output is unaffected.

Can someone check if this is how the IC is designed?

 

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