Come to think of it, I'm about to try the THX Optimizer this weekend... will the audio calibration portion of that play some kind of test tone on discreet channels? If so I guess that would answer my question, if it's coming out of the right speakers even with the receiver in PLII mode I guess it does recognize DD 5.1...
-
Get an exclusive sneak peek into our new project. >>> Click Here
What does PLII do with DD 5.1 sources?
Hi, I have a Sony HTD-DW995 system. If I set the receiver to a PLII mode, does that override the discreet channels from a DD 5.1 source or will it know that it's getting DD 5.1 and play those channels instead of using the matrix decoder? The receiver recognizes DD 5.1 sources in PLII mode but I can't tell if it's playing them correctly or if it's just mixing the channels like it does with a stereo source. Ideally I want to be able to leave it alone and have it automatically switch between DD 5.1 and PLII depending on the content, which would only be possible if the PLII mode correctly plays DD 5.1 sources. I did quite a bit of searching but didn't come up with much, so any advice would be appreciated
![]()
1 - 13 of 13 Posts
Hi M
The receiver is brand new (in fact I'm doing this audio processing over HDMI) but Pro Logic IIx is only for 7.1 setups and this receiver is only 5.1, hence it doesn't come with it. I think you're confusing Pro Logic II with Pro Logic. Pro Logic is the one that has a mono surround channel. Pro Logic II does full 5.1.
That did answer my question though (PLII does nothing to DD 5.1 sources). Thanks
![]()
The receiver is brand new (in fact I'm doing this audio processing over HDMI) but Pro Logic IIx is only for 7.1 setups and this receiver is only 5.1, hence it doesn't come with it. I think you're confusing Pro Logic II with Pro Logic. Pro Logic is the one that has a mono surround channel. Pro Logic II does full 5.1.
That did answer my question though (PLII does nothing to DD 5.1 sources). Thanks
Here is a further explanation of the various Dolby modes..
What's the difference between Pro Logic, Pro Logic II, and Dolby Digital 5.1 Decoding?
Dolby Pro Logic is a matrix decoder that decodes the four channels of surround sound from a Dolby Matrix encoded stereo track, such as VHS HiFi tapes, Stereo CDs, and some TV shows. Dolby Surround is a matrix encoding process that in essence combines the Left, Center, Right, and Surround channels onto a single stereo track. A Pro Logic decoder then extracts the four channels on playback. If you listen to a Dolby Encoded soundtrack on a normal stereo system you may notice some sounds appearing to come from beyond the speakers or even from behind you. Dolby Pro Logic II is an advanced matrix decoder that derives five-channel surround (Left, Center, Right, Left Surround, and Right Surround) from any stereo track. It works on any file even if it hasn't been encoded in the Pro Logic II format. On encoded material such as movie soundtracks, the sound is more like Dolby Digital 5.1, while on unencoded stereo material such as music CDs the effect is a wider, more involving soundfield. Among other improvements over Pro Logic, Pro Logic II provides two full-range surround channels, as opposed to Pro Logic's single, limited-bandwidth surround channel. Dolby Digital 5.1 is the latest in multi-channel delivery. 5.1-channel soundtracks can be heard on most movies either on DVDs or in theatres. Dolby Digital 5.1 is also being offered through Window Media 9, digital cable, digital broadcast TV (DTV), and satellite transmissions.
Dolby Digital is just that: Digital. It needs to be decoded by a Dolby Digital Decoder. It does not use the same Dolby Surround encode/Pro Logic decode process. Though you can listen to Dolby Digital 5.1 Encoded soundtracks in Dolby Pro Logic via the analog outputs on most DVD Players. Dolby Digital 5.1 is a discrete system that keeps the multiple channels fully separated throughout the encoding and decoding processes. In addition to having full-range Left, Center, Right, Left Surround, and Right Surround channels, Dolby Digital 5.1 soundtracks carry a sixth (.1) channel recorded with low-frequency effects.
Quote:
Originally Posted by erick295 /forum/post/12866847
Hi M
The receiver is brand new (in fact I'm doing this audio processing over HDMI) but Pro Logic IIx is only for 7.1 setups and this receiver is only 5.1, hence it doesn't come with it. I think you're confusing Pro Logic II with Pro Logic. Pro Logic is the one that has a mono surround channel. Pro Logic II does full 5.1.
That did answer my question though (PLII does nothing to DD 5.1 sources). Thanks![]()
Here is a further explanation of the various Dolby modes..
What's the difference between Pro Logic, Pro Logic II, and Dolby Digital 5.1 Decoding?
Dolby Pro Logic is a matrix decoder that decodes the four channels of surround sound from a Dolby Matrix encoded stereo track, such as VHS HiFi tapes, Stereo CDs, and some TV shows. Dolby Surround is a matrix encoding process that in essence combines the Left, Center, Right, and Surround channels onto a single stereo track. A Pro Logic decoder then extracts the four channels on playback. If you listen to a Dolby Encoded soundtrack on a normal stereo system you may notice some sounds appearing to come from beyond the speakers or even from behind you. Dolby Pro Logic II is an advanced matrix decoder that derives five-channel surround (Left, Center, Right, Left Surround, and Right Surround) from any stereo track. It works on any file even if it hasn't been encoded in the Pro Logic II format. On encoded material such as movie soundtracks, the sound is more like Dolby Digital 5.1, while on unencoded stereo material such as music CDs the effect is a wider, more involving soundfield. Among other improvements over Pro Logic, Pro Logic II provides two full-range surround channels, as opposed to Pro Logic's single, limited-bandwidth surround channel. Dolby Digital 5.1 is the latest in multi-channel delivery. 5.1-channel soundtracks can be heard on most movies either on DVDs or in theatres. Dolby Digital 5.1 is also being offered through Window Media 9, digital cable, digital broadcast TV (DTV), and satellite transmissions.
Dolby Digital is just that: Digital. It needs to be decoded by a Dolby Digital Decoder. It does not use the same Dolby Surround encode/Pro Logic decode process. Though you can listen to Dolby Digital 5.1 Encoded soundtracks in Dolby Pro Logic via the analog outputs on most DVD Players. Dolby Digital 5.1 is a discrete system that keeps the multiple channels fully separated throughout the encoding and decoding processes. In addition to having full-range Left, Center, Right, Left Surround, and Right Surround channels, Dolby Digital 5.1 soundtracks carry a sixth (.1) channel recorded with low-frequency effects.
Thanks guys, that confirms it and answers my question, the receiver will automatically switch to DD mode
![]()
1 - 13 of 13 Posts
