As I understand it (and I've been asking for six solid months), the analoguer is basically a controlled high frequency rolloff without phase distortion.
My bane is this... for imaging, seperation and detail, high frequency information is critical. And yet, I am one of the few people who seem to be genuinely infuriated by digital artifacting caused by high frequency undersampling and especially those accompanying the sibilants of bright vocalists, of whom I am especially fond.
I also agree with what was stated previously--that introducing an additional component and another set of potentially expensive interconnects is not ideal.
My solution in the meantime has been, frankly, to upgrade every front end source component possible. I'm still in the process of this but I fear that because many of the discs were digitally mixed and mastered that some of the harsh digital artifacts are simply hardcoded into the digital master and not error correction, buffering, reclocking nor upsampling will ever eliminate this from these recordings. I've found these type of issues to be more prevalent in rock recordings and hope they'll decrease in frequency as time goes on but I may yet be driven to add the analoguer to my main rig if the source upgrades don't satisfy me.
Jan hints on his site that expensive source components like the Wadia do something similar to his analoguer but in the digital domain. I'm still not completely clear on how they would do that. Somehow the processor must be able to identify when a chain of information is undersampled and filter it from the playback. If this is the genuine solution to this problem, I wonder if someone might introduce a digital processor to place between the transport and DAC to accomplish this. If so, I'd probably be more easily talked into going that route.
Meanwhile, I think Jan's solution would be more appropriate in a low resolution system such as PC music and the like. I also wonder if a multichannel version might be approriate in home theater where stereo imaging is less critical--though, to be honest, films seem to be recorded a little warm to begin with and rarely suffer from digital artifacts on a decent playback system.
If anyone can add more information to this thread, please do.