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Buffalo Pro 9028 OSF when Using HQPlayer

Just a question about the Pro 9028 OSF filter. The OSF can be switched off with SW2:2, in which case you need to supply your own OSF. I'm using HQPlayer to oversample everything to DSD512 using HQPlayer's own filters, so I guess I can shut off the DAC's internal OSF and just go with the HQPlayer filter.

However, the ES9028 datasheet states that the "FIR filter is bypassed" when playing DSD...does that mean the DAC is already automatically disabling its OSF whenever DSD is played? If so there would be no need to switch off the DAC's OSF manually.

A clarification on this would be greatly appreciated!
 
Just an FYI. There is a lot of information out there on the web stating that ESS chips cannot play DSD with the OSF disabled. That is NOT the case with this generation of chip, I have just verified that the ES9028 Buffalo Pro will play DSD512 with the OSF disabled.