I realised that even though some games supported it, e.g. RE4, my 5.1 speakers are not outputting the surround sound. Even games on the snes9x or zsnes does give me surround sound, provided the games supported it.
Is dolby pro logic II supported?
Yogi
1 - 20 of 22 Posts
Joined
·
34,533 Posts
do you have a dplII compatible reciever.
Joined
·
34,533 Posts
Yes.
Joined
·
34,533 Posts
most won't, because the lack of Hardware mixing strips the audio signal back to stock stereo mixing.
Joined
·
34,533 Posts
in regards to the mixing, the issue is the OS and that dolphin doesn't support DirectSound Hardware mixing. (XP + Directsound output does)
Its not impossible to decode the dolby signal internally, but that would mean having a fully functiobal DSP to begin with....
Its not impossible to decode the dolby signal internally, but that would mean having a fully functiobal DSP to begin with....
I didn't think the Gamecube (and Wii for that matter) was even capable of more than stereo output. If I recall correctly, "Dolby Pro logic II" is achieved using some fancy 3D positioning across two channels (I don't see any special connectors on the unit that would suggest that TRUE 5.1 surround is used). By definition, it "Transforms Stereo into Surround Sound".
I remember games that had "Dolby Digital" would do this too (e.g. I believe Wind Waker on Gamecube had it and even Kingdom Hearts on the PS2). The type of surround sound the original poster is referring to would require 5 separate sound signals instead of just 2. I don't think any Nintendo console to date has that capability.
Hopefully it becomes possible along with HD output in future Nintendo consoles as the PS3 and Xbox 360 can already do it.
I remember games that had "Dolby Digital" would do this too (e.g. I believe Wind Waker on Gamecube had it and even Kingdom Hearts on the PS2). The type of surround sound the original poster is referring to would require 5 separate sound signals instead of just 2. I don't think any Nintendo console to date has that capability.
Hopefully it becomes possible along with HD output in future Nintendo consoles as the PS3 and Xbox 360 can already do it.
Joined
·
378 Posts
By strict definition:
In 2000, Dolby introduced Dolby Pro Logic II (DPL II), an improved implementation of Dolby Pro Logic. DPL II processes any high quality stereo signal source into five separate full frequency channels (right front, center, left front, right rear and left rear). Dolby Pro Logic II also decodes 5 channels from stereo signals encoded in traditional four-channel Dolby Surround. DPL II implements greatly enhanced steering compared to DPL, and as a result, offers an exceptionally stable sound field that simulates 5 channel surround sound to a much more accurate degree than the original Pro Logic.
Because of the limited nature of the original DPL, many consumer electronics manufactures introduced their own processing circuitry, such as the "Jazz", "Hall", and "Stadium" modes found on most common home audio receivers. DPL II forgoes this type of processing and replaces it with simple servo (negative feedback) circuits used to derive five channels. In addition to five full range playback channels, Pro Logic II introduced a Music mode which would not add any processing to the left and right channels, but will still extract a center channel and two surround channels, providing a net effect of a wider center channel.
Pro Logic II system also features a mode designed specifically for video gaming, and it is frequently used in game titles for Sony's PlayStation 2, Nintendo's Nintendo GameCube and Wii as an alternative to digital surround formats like Dolby Digital, or DTS.
Ha! Wish it was DD. It's only Dolby Pro Logic II.
You are replying to a person who plays his games with home theatre setup since SNES days.
Back then, during the snes days, the sound technology available to homes is dolby surround. There was already surround sound in games like fatal fury special, art of fighting, tactics orge, secret of mana 3, etc. With a dolby compatible hifi system, you can get left, center, right & rear sound. You can read up at dolby's website.
DPL II though not discrete/true 5.1, does output distinct 5.1 sound using only 2 cables. Due to the limited bandwidth of only 2 cables, of course, you can't expect the full range of sound on the surround speakers. It can however do simple 5.0 sound effects like, the burning sound of the fireplace (RE4), zombies moaning (RE4), waterfall (RE4), sound of car engine during races (GT4), weapons firing/hitting (FFXII), etc. So DPL II does pretty well for pinpointing the location of zombies in RE4 for me, especially if they are behind me.
i'm missing that aspect while playing on the computer.That's why it puzzles me. Since DPL II is only 2 channel, why isn't my PC's 5.1 setup or my HT setup decode the surround sound from the stereo signals. Essentially, all the surround information is in the stereo signal.
Joined
·
34,533 Posts
Prologic contains positioning streams in the negative frequencies, which is why when done properly PLII can sound as good as DD
Yes, but this requires hardware mixing to provide the frequencies in the right way. software mixing blends the frequencies and you end up with just standard stereo.
Joined
·
34,533 Posts
LLE wouldn't mix any more than stereo either. unless you used openal hardware mixing.
Joined
·
34,533 Posts
i shouldn't have put that fullstop there.
LLE wouldn't be able to send the signals to the sound card for output via software mixing.
On vista you have to use alchemy and enable hardware mixing in pj64 to send the DPL signal to a creative sound card, and since most cards only support openal via software, even then it'd be stripped back to a standard stereo feed.
Since most sound cards (outside of the EMU10/20 lines) lack all level of hardware mixing on windows (x64 lacks hw mixing entirely) You would have to do the demuxing and decoding in the plugin. which is possible in HLE as well as LLE. the limitations there are really in the lack of knowledge about the DSP. Believe me, its not a limitation of HLE vs LLE. either can do DPLII if the HLE was at the point where it was at the same level of implementation as LLE (which itself is lacking)
as for software DPL decoding, a quick look at the ffdshow source will give some idea on how to do it.
actually,... Azimers HLE plugin is commonly used with DPLII recievers because it is the only non beta plugin that supports HW mixing on supported hardware :\.
As it is though.... its looking like software decoding in the plugin is the only option in the future regardless of HLE or LLE use.
Joined
·
34,533 Posts
don't even try going there. You'll lose.
HLE doesn't AT ALL, EVER, NO WAY, NO HOW, mean that the plugin cannot send the dpl mix to the sound card.
That you would even attempt to pull the "I coded it so i know" bull****, will only disgrace yourself.
The only limit is that of the current stage of DSP Emulation. If you can't seem to grasp that fact, it definitely shows that future DSP development is as good as dead.
HLE doesn't AT ALL, EVER, NO WAY, NO HOW, mean that the plugin cannot send the dpl mix to the sound card.
That you would even attempt to pull the "I coded it so i know" bull****, will only disgrace yourself.
The only limit is that of the current stage of DSP Emulation. If you can't seem to grasp that fact, it definitely shows that future DSP development is as good as dead.
Joined
·
34,533 Posts
Shuffle2, feel free to prove that it is impossible to emulate surround positioning in the HLE DSP in the future soley because its HLE and not LLE.
When the hard truth is that the HLE DSP isn't even a shadow of the capabilities of the GC and Wii DSP's, its pretty arrogant to state that DPLII mixing is impossible via HLE when past emulators using HLE output have proven otherwise.
When the hard truth is that the HLE DSP isn't even a shadow of the capabilities of the GC and Wii DSP's, its pretty arrogant to state that DPLII mixing is impossible via HLE when past emulators using HLE output have proven otherwise.
1 - 20 of 22 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
