Re: MD: THX In Layman's Terms
* [EMAIL PROTECTED] on Sat, 27 Jan 2001 | Originally, Pro-logic was exclusive to movie theaters. Right, but it was not called that, it was called "Dolby Surround Sound". It was renamed "Dolby Pro-Logic" for home receivers to avoid confusion with 3-point surround systems. -- Rat [EMAIL PROTECTED]\ Ingredients of Happy Fun Ball include an Minion of Nathan - Nathan says Hi! \ unknown glowing substance which fell to PGP Key: at a key server near you! \ Earth, presumably from outer space. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
Stainless Steel Rat wrote: Right, but it was not called that, it was called "Dolby Surround Sound". It was renamed "Dolby Pro-Logic" for home receivers to avoid confusion with 3-point surround systems. Dolby Surround Sound existed in home receivers before Dolby Pro Logic. Pro Logic was an improvement over "plain" Dolby Surround. It added steering logic to help direct the sounds to the proper speakers. Now Dolby Digital is a discrete set up while Dolby Surround and it's enhanced version, Pro Logic were matrixed kind of similar to SQ quadraphonic sound. The big improvement in Pro logic was the steering of the center channel. But like SQ you still only have 4 channels because the right and left rear carry the exact same information. LAS Larry - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
From: "las" [EMAIL PROTECTED] Now Dolby Digital is a discrete set up while Dolby Surround and it's enhanced version, Pro Logic were matrixed kind of similar to SQ quadraphonic sound. Correct! Go to the head of the class! ;-) Don C. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
* las [EMAIL PROTECTED] on Sun, 28 Jan 2001 | Dolby Surround Sound existed in home receivers before Dolby Pro Logic. | Pro Logic was an improvement over "plain" Dolby Surround. It added | steering logic to help direct the sounds to the proper speakers. Right. I think what I meant to say is that home Dolby Surround is two channels (left and right with mono rear) while theater Dolby Surround is three channels (left, right with mono rear and center channel steering). When three channel Dolby Surround was added to home receivers they renamed it "Pro Logic" to avoid confusion with two channel Dolby Surround. | Now Dolby Digital is a discrete set up while Dolby Surround and it's | enhanced version, Pro Logic were matrixed kind of similar to SQ | quadraphonic sound. Exactly. The trick is to use phase inversion to matrix multiple audio tracks together. Which sounds (heh) like it shouldn't work, but it does when done right. When done wrong -- like on the Japanese audio for the DVD box set of "The Slayers" -- it screws up everything. -- Rat [EMAIL PROTECTED]\ Warning: pregnant women, the elderly, and Minion of Nathan - Nathan says Hi! \ children under 10 should avoid prolonged PGP Key: at a key server near you! \ exposure to Happy Fun Ball. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
Stainless Steel Rat wrote: Exactly. The trick is to use phase inversion to matrix multiple audio tracks together. Which sounds (heh) like it shouldn't work, but it does when done right. Many years ago before I owned a Pro logic receiver, I took the right + from the RT front speaker and sent it the Rt+ on a rear speaker I then took the Left + did the same with a rear left speaker and connected the - of the two speakers together. We used to refer to this a "hot wiring". Surprising (although you could not control the volume of the rear speakers with my set up) the results were often very pleasing. I don't know if what came out of the back was supposed to be there, but it sounded good. I was especially impressed with the movie "The Last Star Fighter". I had some friends over one night to show the movie and they enjoy it so that they applauded at the end! Now eventually I got my Pro logic receiver. The first movie I went to see was of course "The Last Star Fighter". When I listened, I actually thought that I liked the way my hot wired version sounded. Hot wiring can add a nice effect to music also. In theory it is supposed to give you the "ambient sound" which they claim is present on all stereo recordings. There is so much that you can play with when it comes to sound. In my humble opinion, much more than video. For video you want a sharp picture with good color reproduction and as much detail as possible. Grass should look like blades of grass. Not a green blur. Some people might like there picture a little more color intense, more "vivid", more blue, more red, etc. But these are all minor things when compared to sound. Carver of Carver electronics once noticed what he felt was a marked improvement in the sound while he had his fire place going. He experimented and added a circuit to some of his equipment that infused that background sound into the system. I can't remember what he called it. But since you don't see it as an option on equipment today, I guess other people's ears did not enjoy it like his did. But for all of the advances in home audio, in my humble opinion, stereo was the biggest. It created the "WOW!" factor when listening to music. Larry - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
From: "las" [EMAIL PROTECTED] Carver of Carver electronics once noticed what he felt was a marked improvement in the sound while he had his fire place going. He experimented and added a circuit to some of his equipment that infused that background sound into the system. ROTFL! What a snake oil salesman! Bob could sell shoes to double amputees. Don C. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
* las [EMAIL PROTECTED] on Sun, 28 Jan 2001 | We used to refer to this a "hot wiring". Surprising (although you could not | control the volume of the rear speakers with my set up) the results were | often very pleasing. I don't know if what came out of the back was supposed | to be there, but it sounded good. ^^^ Important words. If it sounds good then it is "right". -- Rat [EMAIL PROTECTED]\ Do not taunt Happy Fun Ball. Minion of Nathan - Nathan says Hi! \ PGP Key: at a key server near you! \ - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
[EMAIL PROTECTED] wrote: Originally, Pro-logic was exclusive to movie theaters. Actually Dolby Surround preceeded Pro-logic. Dolby Pro-logic is an improvement over "plain" Dolby Surround in that it added stearing logic to increase the separation between the channels (especially important for the center channel which was not providing enough separation from the right and left). This because Dolby surround is a matrixed system and not discrete. There are limitations in channel separation when using matrixed schemes. The advent of home theater was born, I have read, came about kind of by accident. When prerecorded video tapes started coming out in stereo, the matrixed sound track was automatically carried over on to the tape. Since it it "piggybacked" there was no need to do anything special to have it present. It is just there. Someone got the idea of taking advantage of this matrixed information. Hi Fi VCRs made it even better. You started to see receivers with 4 amps two front and two less powerful rear channels. Early versions only had a preamp out for the center channel. Higher end Pioneer receivers offered a delay to the rear speakers. Until your post I always wondered why my system which had an early high end Pioneer receiver with Pro-logic but just decent sounded so good to people when I had them over to watch a movie. It was the delay. Since I just bought a THX/DTS Onkyo receiver, of course they had to come out with THX-EX and even DTS EX to make my unit obsolete! Larry - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: THX In Layman's Terms
From: [EMAIL PROTECTED] THX receivers process a delayed signal between the rear speakers, enhancing the rear localized effects. These are the 2 significant differences between Pro-logic and THX. Actually Mark, this isn't accurate. THX is not a type of surround processing. The two surround formats which superceded Dolby Pro Logic are Dolby Digital 5.1 and DTS 5.1. THX is simply a set of quality and control standards developed for and intended to be applied to the implementation of discrete surround sound formats. Indeed, contrary to your assertion, the rear channels of current surround formats are discrete channels of information. "Matrixed" rear channel sound ended with Dolby Pro Logic. Other specifications such as timbre match, placement, and THX certified speakers etc etc. are less critical IMO. But those specifications are what THX is. Nothing more. Don - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
