DirectX AudioVideoPlayback and selecting a device and/or panning

Currently using VS2010, DirectX 9, Winforms, .Net 3.5, VB.

I'm creating an application that will play MP3 files through the left and right channels of a sound card. It will also need to play another MP3 file through the centre/rear channel when triggered. I'm currently using DirectX Audio class to play the MP3 files which works fine, but I can't see a way of selecting the device or channel that each sound stream is sent to.

I've looked at a few libs such as Op开发者_开发知识库enTK and BASS.Net. BASS.Net seems promising, but I need to try to avoid the license fee if possible.

Thanks.

Take a look at SlimDX. I've never used it for audio, but it's better than some of the libraries you mention.