I have no doubt there have been Terabytes written on how multichannel content "should" be produced with regards to whether or not a Subwoofer .1 channel or LFE should be included. Dolby seems to be pretty dead set that any "important" content should not be included in the LFE channel since it woul dbe discarded during down mixing (where as content in the other 5 channels isn't).\n\nAnd there's a pretty good argument for that that there's no need to since bass management is now ubiquitous. Better to have the bass in whichever channels it belongs and let the bass management deal with it as preferred by the user (assuming the use configures properly).\n\nBut that's not my question here. I am curious to what extent actual music content, be it SACD, DVD-A, DVD, or CD-surround (e.g. DTS CD) uses the .1 channel.\n\nUnless you defeat your bass management it's not an easy question to answer. But I am asking it anyway. Does anyone have a guess to what extent the .1 is not used (e.g. silent) versus actually used?\n\nSIDE NOTE- the following is not the thread topic.\n\nThe reason I am asking is that I am taking surround music content and encoding as Dolby Digital. I can do it as 5.0 (aka 3\/2) or 5.1 (aka 3\/2L). AC3 is probably smart enough to reallocate bits if there nothing but silence, but there be an advantage to using 5.0 if there's truly nothing on the last channel.