Sound System Design Concept-2012

I need somone who can develop a a sound system design concept. The design needs to have 1 to 10 soundcards in a simple MS Windows machine and create a program which could play different MP3's into each sound card simultaneously so that I can play different music in different rooms. We would also like to have a Playlist and Music library manager functionality. At the end of the project I will require all the project files and the written code. We prefer if the UI code was written in C# (C++ DLL mix is fine for HW integration if required). I will only consider bids from providers who can show me previous examples of work and I will provide more information to the winning bidder. There could be a potential for further work if the project goes well. Happy bidding...