Since I was going to update the PCB design, I thought I might as well improve on as much as I could. So, the new board would:
*Include a new reclocking solution. I went for the best specc’ed chip out there, the famous Potato Semi PO74G374A. One chip would take care of the all of the I2S lines for both DAC chips.
*Add a couple of external 1.8V DVDD power supplies.
*Make some optimization of the LT3042 local regulators’ layout, in order to accommodate larger package capacitors (1206) where it would make most sense.
*Give access to the zero-detect lines of one of the dac chips. These pins could be used to easily implement auto muting of the output stage.
*Give access to the Enable pin of the Si570/Si544. The use of this Enable pin will be explained later.
See project details on Dimdim’s blog.