Look at this, - seems a very interesting and familiar concept:
Nicolae Jitariu is the founder of Rockna and also the designer of some parts of the first PWT!
So he should know PS Audio very well for his contractor work.
Despite this, the I2s format differs slightly from the standard, causing me some headache for my WD Net transport.
Rockna was also an OEM supplier to MSB, e.g. the ladder dac module.
I also find their Vox products interesting: