I see, your encoder works with diskwriter with "use DSP" enable in the processing section.
So, in summary (correct me if I'm wrong

):
1. Enable the "ATSurround Encoder" (make it as one of the Active DSPs) in "DSP Manager".
2. Check "use DSP" in the section of processing in settings of "diskwriter" so that the conversion will make use of the encoder enabled in step 1.
3. Right-click a file in the playlist and select Convert | Run Conversion....... (Assuming that you already know about the process of file format conversion).
The output file will be a multi-channel audio file, that's it!

Question: Is the output file always a 6-channel audio file?
Again, thanks for your great work on the plugin.