The reason for this is that Pro Logic is analog, not digital in nature.Įverything else in your post was spot on. The question is on whether or not there is an intermediary used for storage. The thing to keep in mind here is that the audio always starts as 6 input channels and ends up as 6 output channels. Thus, most DVDs/BluRays use either Dolby Digital or Digital Theater Sound as their audio compression method of choice. Multiple languages can add a lot of overhead, so it's a good idea to save space when possible.
DOLBY PRO LOGIC II DECODER SOFTWARE PC
This will capture the 6 input channels from your PC speakers and compress them in real time into a DD5.1 bitstream.Īs for movies on the other hand, the audio is all prerendered.
DOLBY PRO LOGIC II DECODER SOFTWARE SOFTWARE
To do this, you would need to use a software tool called Dolby Digital Live which requires you to have a compatible sound card as well. The only reason you would want to use DD5.1 in a gaming situation is if you were sending surround audio to an external receiver over an optical connection because the S/PDIF format used for optical audio only supports 2 discrete channels or a digital bitstream (DD/DTS). Since the audio channels are sent directly to the speakers, there's no need to save them and thus no need to compress or encode them. If you configure your PC to use 6 speakers, most games will pick up on that and render 6 audio channels. Every gunshot, shout, alarm, and environmental noise in a game comes from a single channel source which is positioned in the environment and rendered in real time. Games use sound rendering engines to create positional audio from single channel sources. The key word here is "large savings in disk space" as this is really the only reason to use DD5.1. When decoded, it will produce the same 6 input channels with only a small amount of loss but a large savings in disk space. Unlike Pro Logic, the digital bitstream can only be decoded by a Dolby Digital decoder. As its output is a single channel bitstream. It takes as its input 6 discrete channels, Left, Right, Center, Rear Left, Rear Right, and LFE (Low Frequency Effect, commonly used for a discrete subwoofer). When received by a non Pro Logic receiver, the audio appears to be nothing more than standard stereo audio.ĭolby Digital 5.1 is an encoding and compression scheme. Pro Logic is a quadraphonic system in which two additional channels, center and rear, are encoded into the left and right stereo channels. The reason for this is that Pro Logic is analog, not digital in nature. There is no such thing as Dolby Digital Pro Logic, it's Dolby Pro Logic.
What's the differences between them? Using either headset turtle beach capable of digital surround 7.1 and or an actual surround system at home that's capable for a 7.1 surround.
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