Single slew ext vol with AUX ADC
I am using ADAU1701 and I want ot do a external pot to control the gain though the ADC.
My set up is a ADC_In go directly to the orange external control point of the "Single slew ext vol" block.
In fact I can control the volumn with a 3.3V almost getting 0dB gain.
The problem is with 0V, I get only around -50 db gain, which is not enough to supress the audio pass though the gain block.
I am hoping to have more supression when the pot is at 0V
Am I missing some block in between the adc and the vol control?
How can I make it?
Thanks a lot
Audio Signal Processors
SigmaDSP Audio Processors
adau1701
Hmmm, I wonder if the ADC input isn't quite getting all the way down to ground. Well, never mind. The solution is simple! I would suggest using a dynamics processor to scale the ADC input to the range you want.
Take the input of the aux ADC and connect it to a Peak Compressor in SigmaStudio's dynamics processors library. Then follow the suggestions here to make a downward expander and noise gate:
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