If the H9 has a DSP then there is both ADC and DAC functions. You can’t do digital signal processing on an analog signal without them. So whether or not there is digital I/O is irrelevant, and the question about the bit depth and sampling rates used intenally by the Eventide H9, or other pedals in the Eventide lineup that use DSP is completely valid and on point. I can’t find this information anywhere, and I won’t be buying any Eventide pedals unless and until these basic disclosures are made.
Boss, Strymon, and others have no problem supplying customers with this information. Not sure why it is such an issue for Eventide unless it is using something like 16bit/44.1KHz.