This recording is the top soprano line at every point: 'soprano' in most Italian opera scores includes contralto so 'soprano 1' means simply soprano when the parts are split into no more than 2 lines. There are almost no 3-part splits in this opera.
A separate file is included for the opening chorus, where there are two separate choirs. There are also (at no extra charge) files for the 'Cherubini', which is supposed to be sung by a children's choir but may sometimes be taken by some of the adult sopranos.