I use Audacity hugely 2.02 (.exe installer) with windows seven SP1. Today I wanted to export a 6 channel AC3 file and Audacity said “In the Exported file, your tracks will be mixed into a single channel.” I uninstalled and installed again but it did not fix the problem.
Thank you very much it works. It is not by default? (I also had to change in 448 kbps and 48000 Hz) I do not remember. Long ago I installed Audacity. I had a blue screen, it is probably this that has deregulated Audacity …