How do I reset AD16X and DA16X?

To reset the AD-16X, power up the unit while pressing the DOWN button. When reset, the conversion level is set so a +4 dBu analog input results in a –16 dBFs digital output. To reset the DA-16X, power up the unit while pressing the DOWN button. When reset, the conversion level is set so a –16 dBFs digital input results in a +4 dBu analog output. Here is a video demonstrating this: