I am Suprovo Roy,working in Sonodyne Electronics. I am using ADAU1701 dsp ic for my two way active monitor projects.I have a problem regarding gain control which is to be varied from +6 dB to -6 dB . It is always set to 0dB in a normal position. How is it configured in software, sigma dsp and what is circuit required for controling it externaly? Please give me some way.