Playing multiple audio streams simultaneously from one audio file?

You need to use multiple files not channels, its going to be way easier that way. Instead of using Media Player use DirectShow (on . NET you have DirectShow.NET ), In DirectShow you have the notation of Multiple files on the same graph.

I think with Shay's hardware you've got a complete solution: Encode a 7.1 file with a different mono voice track on each channel. Use the 8 channel output device in 7.1 mode, with a different headset in each port, and you've got it. Or, if you only have 6 languages, a 5.1 file would work.

Many PC's have 5.1 outputs built in, you'd only need 3 splitters to break out the left and right channels from each jack.

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