I agree Dave, the Piano 2.1 was originally launched with promise of an app or similar to reconfigure the digital filters or amend the bass output channel to something else. This was all very vaguely worded and so was read in different ways by different people.
It never seemed to come to anything and seemed to be ignored in any question to Allo. If I remember correctly various posts can be found early on in this thread and in other Forums. This was one instance where my communication with Allo support was far from good.
However, let me state clearly I like the sound Allo products deliver and its just the issues I experience and the lack of support from Allo itself which is my issue.
My reason for not contuing with their products is only the support issues from the Allo site.
Anybody wanting an example try this recent one:
http://sparkyforum.allo.com/index.php?topic=1922.0
Surely a company who has designed a board using a third party dac chip to enable it to set its own filter settings could answer the question posted and not simply say go to somebody else?
Read others and see how many actually get a helpful solution.
Mel