One cool use of that ‘Easter Egg’ is to double the available delay time. Sort of like the old DD20 trick, but without the patch cables. In the preset below, a DELAY MIX of A0+B10 yields an initial 6 second delay. Switching over to A10+B0 produces a 3 second delay, with the 2nd delay coming at nine seconds out.
I didn’t know longer delay time were possible on the H9. Thanks!I sometimes I feel limited with the 3 seconds delay when I do my Frippish soundcapes. Having 6 seconds of delay is really nice! Although 16 seconds would be better 
. That’s on my wish for the H9 (but is never going to happen because it is too much CPU I guess).
I have seem some videos of the Dig. Although I like the pedal I haven’t heard anything new on those videos. Wish Strymon would come with a more experimental delay pedal instead of something that can also be achieved with other delays that already on the market.
