RT KS Audio

Bit of an obscure one this, but does anyone know why KSPROPERTY_RTAUDIO_BUFFER_WITH_NOTIFICATION fails for a pin created at 22050khz but is OK if created at 44100? (Pin creation succeeds though

The documentation on this is near zero and no where near this detail?

HW buffer size is 0xE00 in this instance, but the HW doesn’t seem to mind what size the buffer is (within reason of course).

Thanks,