I am using the TLV320AIC26 and can set the DAC gain levels during the initialization but when I try to change the DAC gain levels while it is operating, nothing changes.  I can change the sidetone levels while the system is operating but the DAC gain does not change when I enter new attenuation numbers.  Is this an illegal operation?  It seems the same routine I use to change the sidetone levels should work with the DAC gain levels.  Is the a bit that needs changed so that I can change DAC gain levels while it is operating?