Just to be clear, my quibble is with your use of the word "nothing". Clearly is has SOMETHING to do with with the number of channels. That's impossible to deny given the quotes from the white papers above.Not at all. Because a ZIP file can be used to compress a Word document, an Excel file, a TIFF image, a CSV file.... anything at all. The DTS-HD codec can ONLY be used to compress multichannel digital audio. So, again, clearly, there is SOME relation.