On page 81 of Rev.D of the ADAU145c datasheet there are calculations for the ASRC group delay :
The same equations appear in the AD1895 datasheet, so surely they must be correct.
In the first equation fs_in is in both terms and fs_out is not used and it reduces to GDS = (48 / fs_in)
in the second equation fs_in cancels in the second term and it reduces to GDS = (16 / fs_in ) + (32 / fs_out )
I probably wouldn't be asking this question if they were in the reduced form.
Cheers
Alex
