Legato-Buffalo inversion, straight out of Tenet! 😀 Thanks for your help and ideas. I sure will post back here. Give me some time though as I first finish my b22 amp and save up for the DAC!
my mistake - if you flip Legato you don't invert signal phase, you only reverse left and right channels (relative to the board's markings, not the DAC's output). 
Last edited:
When trying different non-standard components on the Legato I would make one recommendation: try to avoid long lead lengths which do not fit the board well (like enormous capacitors with long bent leads to the board, etc). Remember that this board is adjacent to a DAC, with a fair amount of airborne RF just looking for an antenna to get into the circuitry.