Fixing Aqualung's Quad Mix: The Back Left Channel's Incorrect Polarity; Sometimes Laughably Out of Phase LFE; Swapped Back Channels of "Hymn 43"

[TVB]

You said the magic words, "most music simply doesn't contain such content". Why? The stuff that does is mind blowing! Coldplay's "fix you" on cd has some really low bass in the middle of the song where the bass is so low there is a fluttering sensation that I can feel as well as hear. The only way I even knew it was there was by pulling up the 30 hz slider on my soundcraftsman eq. It is really clean and very desirable. There are other songs with ultra low bass where a properly designed LFE channel could absolutely enhance the listening experience. When I listen to a surround music disc MY DREAM is to control/enhance the bass to my sub by adjusting the volume of the LFE channel, but you can't do that if nothings there! What a TRAVESTY that the LFE was only designed for movies and not music. C'mon all you music production guys, TAKE US TO THE NEXT LEVEL and start putting low frequencies in the LFE channel of music discs. Just dreaming, but how about 2.1 digital discs?

 

[ssully]

if you had to 'pull up the 30Hz slider' on your EQ then it wasn't really meant to be 'heard' that way.

And even then, that doesn't mean it requires a separate LFE channel.

 

[ssully]

It's at the bottom of the first post for all the tracks, but to actually answer your question, for the 96kHz blu ray, I moved the LFE 267,088 samples to the right and inverted its polarity (2 sec and 75,088 samples).

Oops. It took me this long to re-read your original post, and this one, to see that you not only shifted the LFE, you inverted its polarity too. That should eliminate the 'macro OOP" I saw.

 

[Fourplay]

MY DREAM is to control/enhance the bass to my sub by adjusting the volume of the LFE channel, but you can't do that if nothings there!

Actually, I have done just that in my system. My method is to use a routing switcher. One position of the router is a straight pass-through of the LFE out signal of the Oppo to the amp. If I find that to be insufficient, with the push of a button I switch to a summed signal of the four main channels (excluding the center channel), and this signal is run through a DBX brand sub-harmonic synthesizer which has several adjustments including gain. It does not work perfectly in every situation, but in most cases it works very well, and I can easily dial in my LFE to taste from my listening position (using a monopod to twiddle the dial).

One example of where I use this is at the climax of One Of These Days from the hidden Meddle mix. The later part of the song is comparatively anemic, but I can preset the DBX and with a touch of a button I can affect the change pretty much right on cue.

"One of these days" I will post my setup in the "show us your gear" thread. I use the same router for channel isolations and reassignments on the fly. Works great!