This paper describes a versatile software toolbox, which has been developed for researching, teaching and developing in the field of multichannel and 3-D sound signal processing. The software system runs on a PC using any compatible sound card and consists of 5 modules covering some of the main stages and aspects of 3-D sound reproduction using loudspeakers. Multichannel real-time filtering, MLS measurements, inverse filter computation, virtual source placement can be carried out with this tool.