I was hoping that the 1.3x versions would have this feature. I am able to open a 8 Channel WAV file in Audacity but it is converted to a stero and multiple mono tracks. Exporting to WAV only supports stereo.
Microsoft provides a command line utility that will combine 8 separate mono WAV files into a single multi-channel WAV file so you could export your tracks to separate WAV files and then use this utility. Would be a LOT nicer if you could select the channel for each track and then just export to a single WAV file.
It appears that I was wrong. This feature does exist in 1.3x (beta). In the preferences there is an option under inport/export to save as multi-channel files.
When you go to export the file you are given a nice little screen that lets you map tracks to specific channels.
I have been able to create these files but so far have not been able to play them back. My Media Player says that it can’t find the codec? But I am able to play Microsofts Multi-channel (8) WAV file they provide for testing 7.1. Not sure what is wrong? I am saving as a 16bit PCM WAV file.