I would like to use the ADAU1442 parts for 2 of my sound cards.
I need to mux more than 4 various digital signals where the ADAU1442 seems to be a best candidate.
I need to make a volume control + mute feature of all I2S and one SPDIF input. And there is a question.
Is it possibe to control the volume+mute feature from outside? Without the SigmaStudio? Is it possible to make it somehow using of multipurpose (MP) pins? Or via SPI? We want to write a utility to control the volume and need an access to ADAU1442 chip directly instead of only SigmaStudio because this sound card will used on multiple operation systems which SigmaStudio does not support and using of the SigmaStudio only for volume control is not practical.
And last thing please. A volume of the ADC0-ADC3 pis can be controllable by potentiometer, Is it possible to make such thing for I2S/SPDIF inputs?
Thank you very much.