This source is from in-house promo CDs made for internal use at Virgin Records (sourced from the vinyl records), made before "Machina II" was released to the public over the Internet. Two versions of the promos exist, a UK (type I) and U.S. (type II) version, both with four CDs corresponding to the vinyl copies. As it was done in-house at a record company, it is generally assumed to be a high-quality transfer, though some of the faint voices which can be heard in the background before some of the EP songs are cut off, and in general, it is missing a considerable amount of audio between song transitions.