The AS Bass Collection is a bundle of 6 Acoustisamples Bass instruments:
AS Bass Collection comes with its own sample player, the UVI Workstation 3 (requires v3.0.0 or later). Free with every library that you buy, you don't need to buy an expensive sampler to use the product. It works on Mac (10.9 or later) and PC (Windows 8 or higher), in standalone or as a plug-in (VST / AU / AAX ) and in 64 bits only.