This package includes everything an alto ('second soprano' according to printed scores, although occasionally reference is made to 'contralti') might be expected to sing, including in the main files the sacerdotesse and popolo. Separate files are included for schiave, as they sing at the same time as popolo. Both alto 1 and alto 2 are included here: the parts split very seldom (only for about 5 notes for the schiave) so there is very little difference between 1 and 2.