Doom9's Forum - View Single Post - @Midas: DS for DPL2 and possible bug in azid.dll 1.8

DarkAvenger · 4th March 2002, 16:08

Hey Midas,

it would be great if you could add DS for DPL2 support in azid ("Surround2"?). Unfortunately you didn't reply to my mail, so I am trying it here:

According to my experiments (with help of "user/Anwender") you need to do following to get seperation for the rears with DPL2/CircleSurround/Logic7 amp:

The rears must be mixed down with a difference of 3db ie.

instead of mixing SR into Lt and Rt with -3db, I guess it needs to be done like -1.5db into Rt and -4.5db into Lt
same applies to SL: -1.5db into Lt and -4.5db into Rt.

Of course I am not sure about the absolute values (-4.5db and -1.5db), but I know that the difference should be at least 2db, best 3db. This downmix is still compatible with DPL, at least the speparation on the front axis seems to be good enough.

I could do this per hand, of course, but it would be much easier if you'd implement it, as it won't be hard for you, I guess.

bug of azid 1.8?

I am not if it is bufg or I am initilizing azid 1.8 incorrectly:

When trying a mono downmix (from a 5.1) source, the LFE is not downmixed. All other channels seem to be in the "center" mono channel. Could you verify this? (I am sure that with azid 1.7.1 this was even worse.)

4th March 2002, 16:08	#1 \| Link
DarkAvenger HeadAC3he coder Join Date: Oct 2001 Posts: 413	@Midas: DS for DPL2 and possible bug in azid.dll 1.8 Hey Midas, it would be great if you could add DS for DPL2 support in azid ("Surround2"?). Unfortunately you didn't reply to my mail, so I am trying it here: According to my experiments (with help of "user/Anwender") you need to do following to get seperation for the rears with DPL2/CircleSurround/Logic7 amp: The rears must be mixed down with a difference of 3db ie. instead of mixing SR into Lt and Rt with -3db, I guess it needs to be done like -1.5db into Rt and -4.5db into Lt same applies to SL: -1.5db into Lt and -4.5db into Rt. Of course I am not sure about the absolute values (-4.5db and -1.5db), but I know that the difference should be at least 2db, best 3db. This downmix is still compatible with DPL, at least the speparation on the front axis seems to be good enough. I could do this per hand, of course, but it would be much easier if you'd implement it, as it won't be hard for you, I guess. bug of azid 1.8? I am not if it is bufg or I am initilizing azid 1.8 incorrectly: When trying a mono downmix (from a 5.1) source, the LFE is not downmixed. All other channels seem to be in the "center" mono channel. Could you verify this? (I am sure that with azid 1.7.1 this was even worse.)