My customer wants arbitrary phase, in which he can choose from, incremented at 0-90-180-270 deg values based on the ADAU1701 sigma core, implemented as part of a sub woofer system. Is there a possibility for this? How do i implement it? and how do I measure and examine the waveform in sigma studio? I know there are library features that can implement this trick with some kind of delay in between, just a thought.