I think that I know what is going on with my rips from these Quadio's. In the past 4.0 discs were usually authored using 6 channels. The C and lfe channels were either blank or included derivatives of the four main channels.
In the past I always used Foobar to remove the "unnecessary" C and lfe channels, creating a 4.0 file.
The files are structured in the order L,R,Ls,Rs, (4.0) and play properly via a computer's four channel sound card (Out 1,2,3,4.). A 5.1 wav file places the channels in the order of L,R,C,lfe,Ls,Rs. That always caused them to play back as L,R,C,lfe. missing the surround channels! For compatibility I always converted 5.1 to 4.0!
It would appear that the Quadios are structured differently. I can rip them to a 4.0 file but only the front channels play! The file still contains all four channels and the surround channels display on the Spectrograph in Foobar but (Out 3,4) are muted. I can only assume that this was done so that the surround channels don't play back via the C and lfe channels (of a typical AVR).
I can use Foobar to add the extra (C & lfe) channels but there is no way that I know of to add totally blank channels. I have to put something in them derived from the other channels. That creates a six channel file. Playing it back the surrounds now play from (Out 5,6). The curious thing is that (Out 3,4) are still muted! Those derived channels do show up via the Spectrograph in Foobar.
So the file structure was altered to make 4.0 more compatible with 5.1 by somehow muting what otherwise would be C and lfe which in turn makes it less compatible for my use!
My work around is to re-encode the file using Audition 3. That process creates a "proper" 5.1 file with empty channels. That should be fine for most. I can use Foobar on that file to make a 4.0 file that works properly for me.
That makes for a lot of extra work.
I also notice that 192Khz with four or more playback channels is a bit much for my old computer to handle. I start getting clicks and pops on playback so I will have to down convert to 96Khz. I can't hear above 48Khz anyway.
In the past I always used Foobar to remove the "unnecessary" C and lfe channels, creating a 4.0 file.
The files are structured in the order L,R,Ls,Rs, (4.0) and play properly via a computer's four channel sound card (Out 1,2,3,4.). A 5.1 wav file places the channels in the order of L,R,C,lfe,Ls,Rs. That always caused them to play back as L,R,C,lfe. missing the surround channels! For compatibility I always converted 5.1 to 4.0!
It would appear that the Quadios are structured differently. I can rip them to a 4.0 file but only the front channels play! The file still contains all four channels and the surround channels display on the Spectrograph in Foobar but (Out 3,4) are muted. I can only assume that this was done so that the surround channels don't play back via the C and lfe channels (of a typical AVR).
I can use Foobar to add the extra (C & lfe) channels but there is no way that I know of to add totally blank channels. I have to put something in them derived from the other channels. That creates a six channel file. Playing it back the surrounds now play from (Out 5,6). The curious thing is that (Out 3,4) are still muted! Those derived channels do show up via the Spectrograph in Foobar.
So the file structure was altered to make 4.0 more compatible with 5.1 by somehow muting what otherwise would be C and lfe which in turn makes it less compatible for my use!
My work around is to re-encode the file using Audition 3. That process creates a "proper" 5.1 file with empty channels. That should be fine for most. I can use Foobar on that file to make a 4.0 file that works properly for me.
That makes for a lot of extra work.
I also notice that 192Khz with four or more playback channels is a bit much for my old computer to handle. I start getting clicks and pops on playback so I will have to down convert to 96Khz. I can't hear above 48Khz anyway.
