Play a multi channel Wav file and mute single channels

[freakalot]

Hi,

I have created a wav file with 20 channels using ffmpeg. The file itself is fine and can be played properly using tools like Audacity. I also see all the channels there.
How can I actually play such a file with NAudio und have control over the channels (e.g.; muting all channels but 1)? There is no need to play different parts of each channel. All channels should be played together in sync.

Cheers,
Frank