and yes its pretty strait forward too Just a 1:1 at the input impedance rating should get you in the correct direction.
and be sure to use some nice clear non water-based, stinky RTV sillicone. coat the exposed pads after soldering, let dry for a day or two, and glob some more to glue the transformer in place. let set for four days before moving or using it.
putting transformers on the adc helps if the connection going to it is not a perfect balanced circuit. dc offset is eliminated. and there is a little bit of square wave modification that is simular to what happens to the square wave when it hits a tape head. also the harmonics can be much more pleasing. but I mod adc's with carnhills because of there harmonic character is more pleasing to me in a/b them (vs jenson offerings)
It is finding good sounding surface mount passive componates is the hard part.
Manufacturers went too cheap because it cost less to have a board stuffed with surface mount compared to pin and hole. Unfortunately, the end product suffers because of this.